From 3518e868645dfe2a14098d4badf7b0b3c4365b83 Mon Sep 17 00:00:00 2001
From: Leo <582717189@qq.com>
Date: Mon, 4 Jan 2021 14:10:45 +0800
Subject: [PATCH] =?UTF-8?q?=E6=95=B4=E7=90=86?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/leo/{class01_01 => class01}/BSAwesome.java           | 4 +---
 src/leo/{class01_01 => class01}/BSExist.java             | 2 +-
 src/leo/{class01_01 => class01}/BSNear.java              | 3 +--
 src/leo/{class01_01 => class01}/BubbleSort.java          | 2 +-
 src/leo/{class01_01 => class01}/InsertionSort.java       | 2 +-
 src/leo/{class01_01 => class01}/SelectionSort.java       | 2 +-
 src/leo/{class01_02 => class02}/EvenTimesOddTimes.java   | 2 +-
 src/leo/{class01_02 => class02}/KM.java                  | 2 +-
 src/leo/{class02_03 => class03}/DeleteGivenValue.java    | 2 +-
 src/leo/{class02_03 => class03}/GetMax.java              | 2 +-
 src/leo/{class02_03 => class03}/GetMinStack.java         | 4 +---
 src/leo/{class02_03 => class03}/LinkedList.java          | 2 +-
 src/leo/{class02_03 => class03}/RingArray.java           | 2 +-
 src/leo/{class02_03 => class03}/StackAndQueue.java       | 2 +-
 .../{class02_03 => class03}/TwoQueueImplementStack.java  | 2 +-
 .../{class02_03 => class03}/TwoStacksImplementQueue.java | 2 +-
 .../{class03_04 => class04}/BiggerThanRightTwice.java    | 2 +-
 src/leo/{class03_04 => class04}/MergeSort.java           | 2 +-
 src/leo/{class03_04 => class04}/ReversePair.java         | 2 +-
 src/leo/{class03_04 => class04}/SmallSum.java            | 2 +-
 src/leo/{class03_05 => class05}/CountOfRangeSum.java     | 2 +-
 src/leo/{class03_05 => class05}/QuickSort1.java          | 3 +--
 src/leo/{class04_06 => class06}/Comparator.java          | 2 +-
 src/leo/{class04_06 => class06}/HeapSort.java            | 3 +--
 src/leo/{class04_06 => class06}/MyMaxHeap.java           | 4 +---
 .../{class04_06 => class06}/SortArrayDistanceLessK.java  | 2 +-
 src/leo/{class04_07 => class07}/CoverMax.java            | 3 +--
 src/leo/{class04_07 => class07}/EveryStepShowBoss.java   | 2 +-
 src/leo/{class04_07 => class07}/HeapGreater.java         | 2 +-
 src/leo/{class05_08 => class08}/Code01_TrieTree.java     | 2 +-
 src/leo/{class05_08 => class08}/CountSort.java           | 3 +--
 src/leo/{class05_08 => class08}/RadixSort.java           | 2 +-
 src/leo/{class05_08 => class08}/TrieTree.java            | 2 +-
 src/leo/{class05_08 => class08}/TrieTree_Map.java        | 2 +-
 src/leo/{class06_09 => class09}/CopyListWithRandom.java  | 4 +---
 src/leo/{class06_09 => class09}/IsPalindromeList.java    | 6 +-----
 src/leo/{class06_09 => class09}/LinkedListMid.java       | 2 +-
 src/leo/{class06_09 => class09}/Node.java                | 2 +-
 src/leo/{class06_09 => class09}/SmallerEqualBigger.java  | 2 +-
 .../{class06_10 => class10}/FindFirstIntersectNode.java  | 2 +-
 .../NodeAncestorIntersection.java                        | 2 +-
 src/leo/{class07_10 => class10}/TraversalBT.java         | 2 +-
 src/leo/{class07_10 => class10}/TreeNode.java            | 2 +-
 .../EncodeNaryTreeToBinaryTree.java                      | 2 +-
 src/leo/{class07_11 => class11}/LevelTraversalBT.java    | 4 +---
 src/leo/{class07_11 => class11}/PaperFolding.java        | 2 +-
 .../SerializeAndReconstructTree.java                     | 4 +---
 src/leo/{class07_11 => class11}/SuccessorNode.java       | 2 +-
 src/leo/{class07_11 => class11}/TreeMaxWidth.java        | 3 +--
 src/leo/{class08_12 => class12}/IsBST.java               | 2 +-
 src/leo/{class08_12 => class12}/IsBalanced.java          | 6 +-----
 src/leo/{class08_12 => class12}/IsCBT.java               | 3 +--
 src/leo/{class08_12 => class12}/IsFull.java              | 2 +-
 src/leo/{class08_12 => class12}/MaxDistance.java         | 2 +-
 src/leo/{class08_12 => class12}/MaxSubBSTSize.java       | 2 +-
 src/leo/{class08_12 => class12}/Node.java                | 2 +-
 src/leo/{class09_13 => class13}/LowestAncestor.java      | 2 +-
 src/leo/{class09_13 => class13}/LowestLexicography.java  | 2 +-
 src/leo/{class09_13 => class13}/MaxHappy.java            | 2 +-
 src/leo/{class09_13 => class13}/MaxSubBSTHead.java       | 3 +--
 src/leo/{class09_13 => class13}/Node.java                | 2 +-
 src/leo/{class09_14 => class14}/BestArrange.java         | 3 +--
 src/leo/{class09_14 => class14}/IPO.java                 | 2 +-
 src/leo/{class09_14 => class14}/LessMoneySplitGold.java  | 2 +-
 src/leo/{class09_14 => class14}/Light.java               | 2 +-
 src/leo/{class09_14 => class14}/UnionFindClass.java      | 2 +-
 src/leo/{class09_15 => class15}/FriendCircles.java       | 2 +-
 src/leo/{class09_15 => class15}/NumberOfIslands.java     | 2 +-
 src/leo/{class09_15 => class15}/NumberOfIslandsII.java   | 2 +-
 src/leo/{class10_16 => class16}/BFS.java                 | 4 ++--
 src/leo/{class10_16 => class16}/DFS.java                 | 4 ++--
 src/leo/{class10_16 => class16}/Dijkstra.java            | 2 +-
 src/leo/{class10_16 => class16}/Graph/Edge.java          | 2 +-
 src/leo/{class10_16 => class16}/Graph/Graph.java         | 2 +-
 .../{class10_16 => class16}/Graph/GraphGenerator.java    | 5 +----
 src/leo/{class10_16 => class16}/Graph/Node.java          | 2 +-
 src/leo/{class10_16 => class16}/Kruskal.java             | 8 ++++----
 src/leo/{class10_16 => class16}/Prim.java                | 9 ++++-----
 src/leo/{class10_16 => class16}/TopologicalOrder.java    | 7 +++----
 src/leo/{class10_17 => class17}/Dijkstra.java            | 2 +-
 src/leo/{class10_17 => class17}/Edge.java                | 2 +-
 src/leo/{class10_17 => class17}/Graph.java               | 3 +--
 src/leo/{class11_17 => class17}/Hanoi.java               | 2 +-
 src/leo/{class10_17 => class17}/Node.java                | 2 +-
 src/leo/{class11_17 => class17}/PrintStr.java            | 3 +--
 .../ReverseStackUsingRecursive.java                      | 2 +-
 86 files changed, 96 insertions(+), 132 deletions(-)
 rename src/leo/{class01_01 => class01}/BSAwesome.java (99%)
 rename src/leo/{class01_01 => class01}/BSExist.java (99%)
 rename src/leo/{class01_01 => class01}/BSNear.java (99%)
 rename src/leo/{class01_01 => class01}/BubbleSort.java (99%)
 rename src/leo/{class01_01 => class01}/InsertionSort.java (99%)
 rename src/leo/{class01_01 => class01}/SelectionSort.java (99%)
 rename src/leo/{class01_02 => class02}/EvenTimesOddTimes.java (99%)
 rename src/leo/{class01_02 => class02}/KM.java (99%)
 rename src/leo/{class02_03 => class03}/DeleteGivenValue.java (99%)
 rename src/leo/{class02_03 => class03}/GetMax.java (98%)
 rename src/leo/{class02_03 => class03}/GetMinStack.java (99%)
 rename src/leo/{class02_03 => class03}/LinkedList.java (99%)
 rename src/leo/{class02_03 => class03}/RingArray.java (99%)
 rename src/leo/{class02_03 => class03}/StackAndQueue.java (99%)
 rename src/leo/{class02_03 => class03}/TwoQueueImplementStack.java (99%)
 rename src/leo/{class02_03 => class03}/TwoStacksImplementQueue.java (99%)
 rename src/leo/{class03_04 => class04}/BiggerThanRightTwice.java (99%)
 rename src/leo/{class03_04 => class04}/MergeSort.java (99%)
 rename src/leo/{class03_04 => class04}/ReversePair.java (99%)
 rename src/leo/{class03_04 => class04}/SmallSum.java (99%)
 rename src/leo/{class03_05 => class05}/CountOfRangeSum.java (99%)
 rename src/leo/{class03_05 => class05}/QuickSort1.java (99%)
 rename src/leo/{class04_06 => class06}/Comparator.java (97%)
 rename src/leo/{class04_06 => class06}/HeapSort.java (98%)
 rename src/leo/{class04_06 => class06}/MyMaxHeap.java (99%)
 rename src/leo/{class04_06 => class06}/SortArrayDistanceLessK.java (99%)
 rename src/leo/{class04_07 => class07}/CoverMax.java (99%)
 rename src/leo/{class04_07 => class07}/EveryStepShowBoss.java (85%)
 rename src/leo/{class04_07 => class07}/HeapGreater.java (99%)
 rename src/leo/{class05_08 => class08}/Code01_TrieTree.java (99%)
 rename src/leo/{class05_08 => class08}/CountSort.java (96%)
 rename src/leo/{class05_08 => class08}/RadixSort.java (99%)
 rename src/leo/{class05_08 => class08}/TrieTree.java (99%)
 rename src/leo/{class05_08 => class08}/TrieTree_Map.java (99%)
 rename src/leo/{class06_09 => class09}/CopyListWithRandom.java (98%)
 rename src/leo/{class06_09 => class09}/IsPalindromeList.java (98%)
 rename src/leo/{class06_09 => class09}/LinkedListMid.java (99%)
 rename src/leo/{class06_09 => class09}/Node.java (97%)
 rename src/leo/{class06_09 => class09}/SmallerEqualBigger.java (99%)
 rename src/leo/{class06_10 => class10}/FindFirstIntersectNode.java (99%)
 rename src/leo/{class07_10 => class10}/NodeAncestorIntersection.java (91%)
 rename src/leo/{class07_10 => class10}/TraversalBT.java (99%)
 rename src/leo/{class07_10 => class10}/TreeNode.java (90%)
 rename src/leo/{class07_11 => class11}/EncodeNaryTreeToBinaryTree.java (99%)
 rename src/leo/{class07_11 => class11}/LevelTraversalBT.java (98%)
 rename src/leo/{class07_11 => class11}/PaperFolding.java (98%)
 rename src/leo/{class07_11 => class11}/SerializeAndReconstructTree.java (99%)
 rename src/leo/{class07_11 => class11}/SuccessorNode.java (99%)
 rename src/leo/{class07_11 => class11}/TreeMaxWidth.java (99%)
 rename src/leo/{class08_12 => class12}/IsBST.java (99%)
 rename src/leo/{class08_12 => class12}/IsBalanced.java (97%)
 rename src/leo/{class08_12 => class12}/IsCBT.java (99%)
 rename src/leo/{class08_12 => class12}/IsFull.java (99%)
 rename src/leo/{class08_12 => class12}/MaxDistance.java (99%)
 rename src/leo/{class08_12 => class12}/MaxSubBSTSize.java (99%)
 rename src/leo/{class08_12 => class12}/Node.java (90%)
 rename src/leo/{class09_13 => class13}/LowestAncestor.java (99%)
 rename src/leo/{class09_13 => class13}/LowestLexicography.java (85%)
 rename src/leo/{class09_13 => class13}/MaxHappy.java (99%)
 rename src/leo/{class09_13 => class13}/MaxSubBSTHead.java (99%)
 rename src/leo/{class09_13 => class13}/Node.java (90%)
 rename src/leo/{class09_14 => class14}/BestArrange.java (98%)
 rename src/leo/{class09_14 => class14}/IPO.java (98%)
 rename src/leo/{class09_14 => class14}/LessMoneySplitGold.java (99%)
 rename src/leo/{class09_14 => class14}/Light.java (99%)
 rename src/leo/{class09_14 => class14}/UnionFindClass.java (98%)
 rename src/leo/{class09_15 => class15}/FriendCircles.java (99%)
 rename src/leo/{class09_15 => class15}/NumberOfIslands.java (99%)
 rename src/leo/{class09_15 => class15}/NumberOfIslandsII.java (99%)
 rename src/leo/{class10_16 => class16}/BFS.java (96%)
 rename src/leo/{class10_16 => class16}/DFS.java (96%)
 rename src/leo/{class10_16 => class16}/Dijkstra.java (96%)
 rename src/leo/{class10_16 => class16}/Graph/Edge.java (93%)
 rename src/leo/{class10_16 => class16}/Graph/Graph.java (95%)
 rename src/leo/{class10_16 => class16}/Graph/GraphGenerator.java (96%)
 rename src/leo/{class10_16 => class16}/Graph/Node.java (96%)
 rename src/leo/{class10_16 => class16}/Kruskal.java (95%)
 rename src/leo/{class10_16 => class16}/Prim.java (91%)
 rename src/leo/{class10_16 => class16}/TopologicalOrder.java (98%)
 rename src/leo/{class10_17 => class17}/Dijkstra.java (83%)
 rename src/leo/{class10_17 => class17}/Edge.java (93%)
 rename src/leo/{class10_17 => class17}/Graph.java (86%)
 rename src/leo/{class11_17 => class17}/Hanoi.java (97%)
 rename src/leo/{class10_17 => class17}/Node.java (95%)
 rename src/leo/{class11_17 => class17}/PrintStr.java (99%)
 rename src/leo/{class11_17 => class17}/ReverseStackUsingRecursive.java (98%)

diff --git a/src/leo/class01_01/BSAwesome.java b/src/leo/class01/BSAwesome.java
similarity index 99%
rename from src/leo/class01_01/BSAwesome.java
rename to src/leo/class01/BSAwesome.java
index 1967cf0..c75b38d 100644
--- a/src/leo/class01_01/BSAwesome.java
+++ b/src/leo/class01/BSAwesome.java
@@ -1,9 +1,7 @@
-package leo.class01_01;
+package leo.class01;
 
 import leo.util.ArrayUtil;
 
-import java.util.function.IntPredicate;
-
 /**
  * @author Leo
  * @ClassName BSAwesome
diff --git a/src/leo/class01_01/BSExist.java b/src/leo/class01/BSExist.java
similarity index 99%
rename from src/leo/class01_01/BSExist.java
rename to src/leo/class01/BSExist.java
index b6c0e60..4de9a9e 100644
--- a/src/leo/class01_01/BSExist.java
+++ b/src/leo/class01/BSExist.java
@@ -1,4 +1,4 @@
-package leo.class01_01;
+package leo.class01;
 
 
 import leo.util.ArrayUtil;
diff --git a/src/leo/class01_01/BSNear.java b/src/leo/class01/BSNear.java
similarity index 99%
rename from src/leo/class01_01/BSNear.java
rename to src/leo/class01/BSNear.java
index 4a4c685..a8a52eb 100644
--- a/src/leo/class01_01/BSNear.java
+++ b/src/leo/class01/BSNear.java
@@ -1,6 +1,5 @@
-package leo.class01_01;
+package leo.class01;
 
-import jdk.nashorn.internal.ir.IfNode;
 import leo.util.ArrayUtil;
 
 import java.util.Arrays;
diff --git a/src/leo/class01_01/BubbleSort.java b/src/leo/class01/BubbleSort.java
similarity index 99%
rename from src/leo/class01_01/BubbleSort.java
rename to src/leo/class01/BubbleSort.java
index f52d85f..abc8f8b 100644
--- a/src/leo/class01_01/BubbleSort.java
+++ b/src/leo/class01/BubbleSort.java
@@ -1,4 +1,4 @@
-package leo.class01_01;
+package leo.class01;
 
 import leo.util.ArrayUtil;
 
diff --git a/src/leo/class01_01/InsertionSort.java b/src/leo/class01/InsertionSort.java
similarity index 99%
rename from src/leo/class01_01/InsertionSort.java
rename to src/leo/class01/InsertionSort.java
index 4fe37f0..82cbd8b 100644
--- a/src/leo/class01_01/InsertionSort.java
+++ b/src/leo/class01/InsertionSort.java
@@ -1,4 +1,4 @@
-package leo.class01_01;
+package leo.class01;
 
 import leo.util.ArrayUtil;
 
diff --git a/src/leo/class01_01/SelectionSort.java b/src/leo/class01/SelectionSort.java
similarity index 99%
rename from src/leo/class01_01/SelectionSort.java
rename to src/leo/class01/SelectionSort.java
index 883b80c..b058591 100644
--- a/src/leo/class01_01/SelectionSort.java
+++ b/src/leo/class01/SelectionSort.java
@@ -1,4 +1,4 @@
-package leo.class01_01;
+package leo.class01;
 
 import leo.util.ArrayUtil;
 
diff --git a/src/leo/class01_02/EvenTimesOddTimes.java b/src/leo/class02/EvenTimesOddTimes.java
similarity index 99%
rename from src/leo/class01_02/EvenTimesOddTimes.java
rename to src/leo/class02/EvenTimesOddTimes.java
index 0ec3279..5e1e14e 100644
--- a/src/leo/class01_02/EvenTimesOddTimes.java
+++ b/src/leo/class02/EvenTimesOddTimes.java
@@ -1,4 +1,4 @@
-package leo.class01_02;
+package leo.class02;
 
 /**
  * @author Leo
diff --git a/src/leo/class01_02/KM.java b/src/leo/class02/KM.java
similarity index 99%
rename from src/leo/class01_02/KM.java
rename to src/leo/class02/KM.java
index ed898d4..d35ecd5 100644
--- a/src/leo/class01_02/KM.java
+++ b/src/leo/class02/KM.java
@@ -1,4 +1,4 @@
-package leo.class01_02;
+package leo.class02;
 
 import java.util.HashMap;
 import java.util.HashSet;
diff --git a/src/leo/class02_03/DeleteGivenValue.java b/src/leo/class03/DeleteGivenValue.java
similarity index 99%
rename from src/leo/class02_03/DeleteGivenValue.java
rename to src/leo/class03/DeleteGivenValue.java
index ab89707..8df0ce0 100644
--- a/src/leo/class02_03/DeleteGivenValue.java
+++ b/src/leo/class03/DeleteGivenValue.java
@@ -1,4 +1,4 @@
-package leo.class02_03;
+package leo.class03;
 
 /**
  * @author Leo
diff --git a/src/leo/class02_03/GetMax.java b/src/leo/class03/GetMax.java
similarity index 98%
rename from src/leo/class02_03/GetMax.java
rename to src/leo/class03/GetMax.java
index fdee230..06ffd35 100644
--- a/src/leo/class02_03/GetMax.java
+++ b/src/leo/class03/GetMax.java
@@ -1,4 +1,4 @@
-package leo.class02_03;
+package leo.class03;
 
 import leo.util.ArrayUtil;
 
diff --git a/src/leo/class02_03/GetMinStack.java b/src/leo/class03/GetMinStack.java
similarity index 99%
rename from src/leo/class02_03/GetMinStack.java
rename to src/leo/class03/GetMinStack.java
index b832156..e3cc8d7 100644
--- a/src/leo/class02_03/GetMinStack.java
+++ b/src/leo/class03/GetMinStack.java
@@ -1,6 +1,4 @@
-package leo.class02_03;
-
-import sun.jvm.hotspot.jdi.IntegerTypeImpl;
+package leo.class03;
 
 import java.util.ArrayList;
 import java.util.Arrays;
diff --git a/src/leo/class02_03/LinkedList.java b/src/leo/class03/LinkedList.java
similarity index 99%
rename from src/leo/class02_03/LinkedList.java
rename to src/leo/class03/LinkedList.java
index f54303f..430ac40 100644
--- a/src/leo/class02_03/LinkedList.java
+++ b/src/leo/class03/LinkedList.java
@@ -1,4 +1,4 @@
-package leo.class02_03;
+package leo.class03;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/src/leo/class02_03/RingArray.java b/src/leo/class03/RingArray.java
similarity index 99%
rename from src/leo/class02_03/RingArray.java
rename to src/leo/class03/RingArray.java
index d8e6ebb..0a9ee0b 100644
--- a/src/leo/class02_03/RingArray.java
+++ b/src/leo/class03/RingArray.java
@@ -1,4 +1,4 @@
-package leo.class02_03;
+package leo.class03;
 
 
 import java.util.Queue;
diff --git a/src/leo/class02_03/StackAndQueue.java b/src/leo/class03/StackAndQueue.java
similarity index 99%
rename from src/leo/class02_03/StackAndQueue.java
rename to src/leo/class03/StackAndQueue.java
index ede8b69..8ccabe4 100644
--- a/src/leo/class02_03/StackAndQueue.java
+++ b/src/leo/class03/StackAndQueue.java
@@ -1,4 +1,4 @@
-package leo.class02_03;
+package leo.class03;
 
 import java.util.LinkedList;
 import java.util.Queue;
diff --git a/src/leo/class02_03/TwoQueueImplementStack.java b/src/leo/class03/TwoQueueImplementStack.java
similarity index 99%
rename from src/leo/class02_03/TwoQueueImplementStack.java
rename to src/leo/class03/TwoQueueImplementStack.java
index 1e58ce1..84db022 100644
--- a/src/leo/class02_03/TwoQueueImplementStack.java
+++ b/src/leo/class03/TwoQueueImplementStack.java
@@ -1,4 +1,4 @@
-package leo.class02_03;
+package leo.class03;
 
 import java.util.LinkedList;
 import java.util.Queue;
diff --git a/src/leo/class02_03/TwoStacksImplementQueue.java b/src/leo/class03/TwoStacksImplementQueue.java
similarity index 99%
rename from src/leo/class02_03/TwoStacksImplementQueue.java
rename to src/leo/class03/TwoStacksImplementQueue.java
index 564d7d7..317b9f3 100644
--- a/src/leo/class02_03/TwoStacksImplementQueue.java
+++ b/src/leo/class03/TwoStacksImplementQueue.java
@@ -1,4 +1,4 @@
-package leo.class02_03;
+package leo.class03;
 
 import java.util.LinkedList;
 import java.util.Queue;
diff --git a/src/leo/class03_04/BiggerThanRightTwice.java b/src/leo/class04/BiggerThanRightTwice.java
similarity index 99%
rename from src/leo/class03_04/BiggerThanRightTwice.java
rename to src/leo/class04/BiggerThanRightTwice.java
index cb36c26..9677c6d 100644
--- a/src/leo/class03_04/BiggerThanRightTwice.java
+++ b/src/leo/class04/BiggerThanRightTwice.java
@@ -1,4 +1,4 @@
-package leo.class03_04;
+package leo.class04;
 
 /**
  * @author Leo
diff --git a/src/leo/class03_04/MergeSort.java b/src/leo/class04/MergeSort.java
similarity index 99%
rename from src/leo/class03_04/MergeSort.java
rename to src/leo/class04/MergeSort.java
index 25cb434..0971037 100644
--- a/src/leo/class03_04/MergeSort.java
+++ b/src/leo/class04/MergeSort.java
@@ -1,4 +1,4 @@
-package leo.class03_04;
+package leo.class04;
 
 
 import leo.util.ArrayUtil;
diff --git a/src/leo/class03_04/ReversePair.java b/src/leo/class04/ReversePair.java
similarity index 99%
rename from src/leo/class03_04/ReversePair.java
rename to src/leo/class04/ReversePair.java
index 8c94917..7ef2bf1 100644
--- a/src/leo/class03_04/ReversePair.java
+++ b/src/leo/class04/ReversePair.java
@@ -1,4 +1,4 @@
-package leo.class03_04;
+package leo.class04;
 
 import leo.util.ArrayUtil;
 
diff --git a/src/leo/class03_04/SmallSum.java b/src/leo/class04/SmallSum.java
similarity index 99%
rename from src/leo/class03_04/SmallSum.java
rename to src/leo/class04/SmallSum.java
index bcc0ebd..94b03e5 100644
--- a/src/leo/class03_04/SmallSum.java
+++ b/src/leo/class04/SmallSum.java
@@ -1,4 +1,4 @@
-package leo.class03_04;
+package leo.class04;
 
 import leo.util.ArrayUtil;
 
diff --git a/src/leo/class03_05/CountOfRangeSum.java b/src/leo/class05/CountOfRangeSum.java
similarity index 99%
rename from src/leo/class03_05/CountOfRangeSum.java
rename to src/leo/class05/CountOfRangeSum.java
index 1369ad6..4aba67e 100644
--- a/src/leo/class03_05/CountOfRangeSum.java
+++ b/src/leo/class05/CountOfRangeSum.java
@@ -1,4 +1,4 @@
-package leo.class03_05;
+package leo.class05;
 
 import leo.util.ArrayUtil;
 
diff --git a/src/leo/class03_05/QuickSort1.java b/src/leo/class05/QuickSort1.java
similarity index 99%
rename from src/leo/class03_05/QuickSort1.java
rename to src/leo/class05/QuickSort1.java
index 465ea85..76f8aef 100644
--- a/src/leo/class03_05/QuickSort1.java
+++ b/src/leo/class05/QuickSort1.java
@@ -1,7 +1,6 @@
-package leo.class03_05;
+package leo.class05;
 
 import leo.util.ArrayUtil;
-import sun.jvm.hotspot.debugger.Page;
 
 import java.util.Arrays;
 import java.util.Stack;
diff --git a/src/leo/class04_06/Comparator.java b/src/leo/class06/Comparator.java
similarity index 97%
rename from src/leo/class04_06/Comparator.java
rename to src/leo/class06/Comparator.java
index d228264..08cf420 100644
--- a/src/leo/class04_06/Comparator.java
+++ b/src/leo/class06/Comparator.java
@@ -1,4 +1,4 @@
-package leo.class04_06;
+package leo.class06;
 
 /**
  * @author Leo
diff --git a/src/leo/class04_06/HeapSort.java b/src/leo/class06/HeapSort.java
similarity index 98%
rename from src/leo/class04_06/HeapSort.java
rename to src/leo/class06/HeapSort.java
index 430ea2c..1a14ede 100644
--- a/src/leo/class04_06/HeapSort.java
+++ b/src/leo/class06/HeapSort.java
@@ -1,7 +1,6 @@
-package leo.class04_06;
+package leo.class06;
 
 import leo.util.ArrayUtil;
-import sun.jvm.hotspot.debugger.Page;
 
 import java.util.Arrays;
 
diff --git a/src/leo/class04_06/MyMaxHeap.java b/src/leo/class06/MyMaxHeap.java
similarity index 99%
rename from src/leo/class04_06/MyMaxHeap.java
rename to src/leo/class06/MyMaxHeap.java
index d837cc1..bc86608 100644
--- a/src/leo/class04_06/MyMaxHeap.java
+++ b/src/leo/class06/MyMaxHeap.java
@@ -1,8 +1,6 @@
-package leo.class04_06;
+package leo.class06;
 
 import java.util.PriorityQueue;
-import java.util.concurrent.ForkJoinPool;
-import java.util.function.IntPredicate;
 
 /**
  * @author Leo
diff --git a/src/leo/class04_06/SortArrayDistanceLessK.java b/src/leo/class06/SortArrayDistanceLessK.java
similarity index 99%
rename from src/leo/class04_06/SortArrayDistanceLessK.java
rename to src/leo/class06/SortArrayDistanceLessK.java
index 50cd2ac..747540a 100644
--- a/src/leo/class04_06/SortArrayDistanceLessK.java
+++ b/src/leo/class06/SortArrayDistanceLessK.java
@@ -1,4 +1,4 @@
-package leo.class04_06;
+package leo.class06;
 
 import leo.util.ArrayUtil;
 
diff --git a/src/leo/class04_07/CoverMax.java b/src/leo/class07/CoverMax.java
similarity index 99%
rename from src/leo/class04_07/CoverMax.java
rename to src/leo/class07/CoverMax.java
index d87d559..73228b8 100644
--- a/src/leo/class04_07/CoverMax.java
+++ b/src/leo/class07/CoverMax.java
@@ -1,9 +1,8 @@
-package leo.class04_07;
+package leo.class07;
 
 import java.util.Arrays;
 import java.util.Comparator;
 import java.util.PriorityQueue;
-import java.util.Stack;
 
 /**
  * @author Leo
diff --git a/src/leo/class04_07/EveryStepShowBoss.java b/src/leo/class07/EveryStepShowBoss.java
similarity index 85%
rename from src/leo/class04_07/EveryStepShowBoss.java
rename to src/leo/class07/EveryStepShowBoss.java
index 1f83036..c167520 100644
--- a/src/leo/class04_07/EveryStepShowBoss.java
+++ b/src/leo/class07/EveryStepShowBoss.java
@@ -1,4 +1,4 @@
-package leo.class04_07;
+package leo.class07;
 
 /**
  * @author Leo
diff --git a/src/leo/class04_07/HeapGreater.java b/src/leo/class07/HeapGreater.java
similarity index 99%
rename from src/leo/class04_07/HeapGreater.java
rename to src/leo/class07/HeapGreater.java
index cc63c66..f399292 100644
--- a/src/leo/class04_07/HeapGreater.java
+++ b/src/leo/class07/HeapGreater.java
@@ -1,4 +1,4 @@
-package leo.class04_07;
+package leo.class07;
 
 import java.util.ArrayList;
 import java.util.Comparator;
diff --git a/src/leo/class05_08/Code01_TrieTree.java b/src/leo/class08/Code01_TrieTree.java
similarity index 99%
rename from src/leo/class05_08/Code01_TrieTree.java
rename to src/leo/class08/Code01_TrieTree.java
index 2ec7f79..f363938 100644
--- a/src/leo/class05_08/Code01_TrieTree.java
+++ b/src/leo/class08/Code01_TrieTree.java
@@ -1,4 +1,4 @@
-package leo.class05_08;
+package leo.class08;
 
 import java.util.HashMap;
 
diff --git a/src/leo/class05_08/CountSort.java b/src/leo/class08/CountSort.java
similarity index 96%
rename from src/leo/class05_08/CountSort.java
rename to src/leo/class08/CountSort.java
index 45be747..f2bbef7 100644
--- a/src/leo/class05_08/CountSort.java
+++ b/src/leo/class08/CountSort.java
@@ -1,7 +1,6 @@
-package leo.class05_08;
+package leo.class08;
 
 import leo.util.ArrayUtil;
-import sun.jvm.hotspot.oops.BranchData;
 
 import java.util.Arrays;
 
diff --git a/src/leo/class05_08/RadixSort.java b/src/leo/class08/RadixSort.java
similarity index 99%
rename from src/leo/class05_08/RadixSort.java
rename to src/leo/class08/RadixSort.java
index a84d7e8..ff55091 100644
--- a/src/leo/class05_08/RadixSort.java
+++ b/src/leo/class08/RadixSort.java
@@ -1,4 +1,4 @@
-package leo.class05_08;
+package leo.class08;
 
 import leo.util.ArrayUtil;
 
diff --git a/src/leo/class05_08/TrieTree.java b/src/leo/class08/TrieTree.java
similarity index 99%
rename from src/leo/class05_08/TrieTree.java
rename to src/leo/class08/TrieTree.java
index b9a1d77..63d9ae7 100644
--- a/src/leo/class05_08/TrieTree.java
+++ b/src/leo/class08/TrieTree.java
@@ -1,4 +1,4 @@
-package leo.class05_08;
+package leo.class08;
 
 import java.util.HashMap;
 
diff --git a/src/leo/class05_08/TrieTree_Map.java b/src/leo/class08/TrieTree_Map.java
similarity index 99%
rename from src/leo/class05_08/TrieTree_Map.java
rename to src/leo/class08/TrieTree_Map.java
index ea5f89c..8815f6d 100644
--- a/src/leo/class05_08/TrieTree_Map.java
+++ b/src/leo/class08/TrieTree_Map.java
@@ -1,4 +1,4 @@
-package leo.class05_08;
+package leo.class08;
 
 import java.util.HashMap;
 
diff --git a/src/leo/class06_09/CopyListWithRandom.java b/src/leo/class09/CopyListWithRandom.java
similarity index 98%
rename from src/leo/class06_09/CopyListWithRandom.java
rename to src/leo/class09/CopyListWithRandom.java
index 1825bcd..2aafc15 100644
--- a/src/leo/class06_09/CopyListWithRandom.java
+++ b/src/leo/class09/CopyListWithRandom.java
@@ -1,6 +1,4 @@
-package leo.class06_09;
-
-import com.sun.org.apache.regexp.internal.REUtil;
+package leo.class09;
 
 import java.util.HashMap;
 
diff --git a/src/leo/class06_09/IsPalindromeList.java b/src/leo/class09/IsPalindromeList.java
similarity index 98%
rename from src/leo/class06_09/IsPalindromeList.java
rename to src/leo/class09/IsPalindromeList.java
index a02079f..07263a0 100644
--- a/src/leo/class06_09/IsPalindromeList.java
+++ b/src/leo/class09/IsPalindromeList.java
@@ -1,9 +1,5 @@
-package leo.class06_09;
+package leo.class09;
 
-import com.sun.org.apache.xpath.internal.functions.FuncFalse;
-
-import javax.print.attribute.standard.NumberUp;
-import javax.swing.plaf.TreeUI;
 import java.util.Stack;
 
 /**
diff --git a/src/leo/class06_09/LinkedListMid.java b/src/leo/class09/LinkedListMid.java
similarity index 99%
rename from src/leo/class06_09/LinkedListMid.java
rename to src/leo/class09/LinkedListMid.java
index 8d461fb..52a7da8 100644
--- a/src/leo/class06_09/LinkedListMid.java
+++ b/src/leo/class09/LinkedListMid.java
@@ -1,4 +1,4 @@
-package leo.class06_09;
+package leo.class09;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/src/leo/class06_09/Node.java b/src/leo/class09/Node.java
similarity index 97%
rename from src/leo/class06_09/Node.java
rename to src/leo/class09/Node.java
index a325757..61a0509 100644
--- a/src/leo/class06_09/Node.java
+++ b/src/leo/class09/Node.java
@@ -1,4 +1,4 @@
-package leo.class06_09;
+package leo.class09;
 
 /**
  * @author Leo
diff --git a/src/leo/class06_09/SmallerEqualBigger.java b/src/leo/class09/SmallerEqualBigger.java
similarity index 99%
rename from src/leo/class06_09/SmallerEqualBigger.java
rename to src/leo/class09/SmallerEqualBigger.java
index d2af1a7..42befe7 100644
--- a/src/leo/class06_09/SmallerEqualBigger.java
+++ b/src/leo/class09/SmallerEqualBigger.java
@@ -1,4 +1,4 @@
-package leo.class06_09;
+package leo.class09;
 
 /**
  * @author Leo
diff --git a/src/leo/class06_10/FindFirstIntersectNode.java b/src/leo/class10/FindFirstIntersectNode.java
similarity index 99%
rename from src/leo/class06_10/FindFirstIntersectNode.java
rename to src/leo/class10/FindFirstIntersectNode.java
index db0073a..c94681d 100644
--- a/src/leo/class06_10/FindFirstIntersectNode.java
+++ b/src/leo/class10/FindFirstIntersectNode.java
@@ -1,4 +1,4 @@
-package leo.class06_10;
+package leo.class10;
 
 class Node{
     int value;
diff --git a/src/leo/class07_10/NodeAncestorIntersection.java b/src/leo/class10/NodeAncestorIntersection.java
similarity index 91%
rename from src/leo/class07_10/NodeAncestorIntersection.java
rename to src/leo/class10/NodeAncestorIntersection.java
index 6e0f18b..647622b 100644
--- a/src/leo/class07_10/NodeAncestorIntersection.java
+++ b/src/leo/class10/NodeAncestorIntersection.java
@@ -1,4 +1,4 @@
-package leo.class07_10;
+package leo.class10;
 
 /**
  * @author Leo
diff --git a/src/leo/class07_10/TraversalBT.java b/src/leo/class10/TraversalBT.java
similarity index 99%
rename from src/leo/class07_10/TraversalBT.java
rename to src/leo/class10/TraversalBT.java
index 4859546..ab0b170 100644
--- a/src/leo/class07_10/TraversalBT.java
+++ b/src/leo/class10/TraversalBT.java
@@ -1,4 +1,4 @@
-package leo.class07_10;
+package leo.class10;
 
 
 import java.util.Stack;
diff --git a/src/leo/class07_10/TreeNode.java b/src/leo/class10/TreeNode.java
similarity index 90%
rename from src/leo/class07_10/TreeNode.java
rename to src/leo/class10/TreeNode.java
index 184c74f..a809deb 100644
--- a/src/leo/class07_10/TreeNode.java
+++ b/src/leo/class10/TreeNode.java
@@ -1,4 +1,4 @@
-package leo.class07_10;
+package leo.class10;
 
 /**
  * @author Leo
diff --git a/src/leo/class07_11/EncodeNaryTreeToBinaryTree.java b/src/leo/class11/EncodeNaryTreeToBinaryTree.java
similarity index 99%
rename from src/leo/class07_11/EncodeNaryTreeToBinaryTree.java
rename to src/leo/class11/EncodeNaryTreeToBinaryTree.java
index 6b7a9cc..15c50db 100644
--- a/src/leo/class07_11/EncodeNaryTreeToBinaryTree.java
+++ b/src/leo/class11/EncodeNaryTreeToBinaryTree.java
@@ -1,4 +1,4 @@
-package leo.class07_11;
+package leo.class11;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/src/leo/class07_11/LevelTraversalBT.java b/src/leo/class11/LevelTraversalBT.java
similarity index 98%
rename from src/leo/class07_11/LevelTraversalBT.java
rename to src/leo/class11/LevelTraversalBT.java
index 6168e48..e8afef9 100644
--- a/src/leo/class07_11/LevelTraversalBT.java
+++ b/src/leo/class11/LevelTraversalBT.java
@@ -1,8 +1,6 @@
-package leo.class07_11;
+package leo.class11;
 
 
-import leo.class07_10.TreeNode;
-
 import java.util.LinkedList;
 import java.util.Queue;
 
diff --git a/src/leo/class07_11/PaperFolding.java b/src/leo/class11/PaperFolding.java
similarity index 98%
rename from src/leo/class07_11/PaperFolding.java
rename to src/leo/class11/PaperFolding.java
index 0f709c6..0d1c469 100644
--- a/src/leo/class07_11/PaperFolding.java
+++ b/src/leo/class11/PaperFolding.java
@@ -1,4 +1,4 @@
-package leo.class07_11;
+package leo.class11;
 
 /**
  * @author Leo
diff --git a/src/leo/class07_11/SerializeAndReconstructTree.java b/src/leo/class11/SerializeAndReconstructTree.java
similarity index 99%
rename from src/leo/class07_11/SerializeAndReconstructTree.java
rename to src/leo/class11/SerializeAndReconstructTree.java
index 066cb72..91070e9 100644
--- a/src/leo/class07_11/SerializeAndReconstructTree.java
+++ b/src/leo/class11/SerializeAndReconstructTree.java
@@ -1,6 +1,4 @@
-package leo.class07_11;
-
-import com.sun.tools.javac.util.ListBuffer;
+package leo.class11;
 
 import java.util.LinkedList;
 import java.util.Queue;
diff --git a/src/leo/class07_11/SuccessorNode.java b/src/leo/class11/SuccessorNode.java
similarity index 99%
rename from src/leo/class07_11/SuccessorNode.java
rename to src/leo/class11/SuccessorNode.java
index c192670..919ae05 100644
--- a/src/leo/class07_11/SuccessorNode.java
+++ b/src/leo/class11/SuccessorNode.java
@@ -1,4 +1,4 @@
-package leo.class07_11;
+package leo.class11;
 
 /**
  * @author Leo
diff --git a/src/leo/class07_11/TreeMaxWidth.java b/src/leo/class11/TreeMaxWidth.java
similarity index 99%
rename from src/leo/class07_11/TreeMaxWidth.java
rename to src/leo/class11/TreeMaxWidth.java
index 301ff01..0eeda59 100644
--- a/src/leo/class07_11/TreeMaxWidth.java
+++ b/src/leo/class11/TreeMaxWidth.java
@@ -1,6 +1,5 @@
-package leo.class07_11;
+package leo.class11;
 
-import java.time.OffsetDateTime;
 import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.Map;
diff --git a/src/leo/class08_12/IsBST.java b/src/leo/class12/IsBST.java
similarity index 99%
rename from src/leo/class08_12/IsBST.java
rename to src/leo/class12/IsBST.java
index 24c7ff7..e544337 100644
--- a/src/leo/class08_12/IsBST.java
+++ b/src/leo/class12/IsBST.java
@@ -1,4 +1,4 @@
-package leo.class08_12;
+package leo.class12;
 
 import java.util.ArrayList;
 
diff --git a/src/leo/class08_12/IsBalanced.java b/src/leo/class12/IsBalanced.java
similarity index 97%
rename from src/leo/class08_12/IsBalanced.java
rename to src/leo/class12/IsBalanced.java
index 3532bae..5abba66 100644
--- a/src/leo/class08_12/IsBalanced.java
+++ b/src/leo/class12/IsBalanced.java
@@ -1,8 +1,4 @@
-package leo.class08_12;
-
-import com.sun.deploy.security.TrustRecorder;
-
-import java.net.HttpRetryException;
+package leo.class12;
 
 /**
  * @author Leo
diff --git a/src/leo/class08_12/IsCBT.java b/src/leo/class12/IsCBT.java
similarity index 99%
rename from src/leo/class08_12/IsCBT.java
rename to src/leo/class12/IsCBT.java
index b01a624..61137bf 100644
--- a/src/leo/class08_12/IsCBT.java
+++ b/src/leo/class12/IsCBT.java
@@ -1,6 +1,5 @@
-package leo.class08_12;
+package leo.class12;
 
-import javax.swing.plaf.TreeUI;
 import java.util.LinkedList;
 import java.util.Queue;
 
diff --git a/src/leo/class08_12/IsFull.java b/src/leo/class12/IsFull.java
similarity index 99%
rename from src/leo/class08_12/IsFull.java
rename to src/leo/class12/IsFull.java
index 6d71a2c..590f311 100644
--- a/src/leo/class08_12/IsFull.java
+++ b/src/leo/class12/IsFull.java
@@ -1,4 +1,4 @@
-package leo.class08_12;
+package leo.class12;
 
 /**
  * @author Leo
diff --git a/src/leo/class08_12/MaxDistance.java b/src/leo/class12/MaxDistance.java
similarity index 99%
rename from src/leo/class08_12/MaxDistance.java
rename to src/leo/class12/MaxDistance.java
index 8684803..7f20cc3 100644
--- a/src/leo/class08_12/MaxDistance.java
+++ b/src/leo/class12/MaxDistance.java
@@ -1,4 +1,4 @@
-package leo.class08_12;
+package leo.class12;
 
 import java.util.ArrayList;
 import java.util.HashMap;
diff --git a/src/leo/class08_12/MaxSubBSTSize.java b/src/leo/class12/MaxSubBSTSize.java
similarity index 99%
rename from src/leo/class08_12/MaxSubBSTSize.java
rename to src/leo/class12/MaxSubBSTSize.java
index 03b6eec..17bc933 100644
--- a/src/leo/class08_12/MaxSubBSTSize.java
+++ b/src/leo/class12/MaxSubBSTSize.java
@@ -1,4 +1,4 @@
-package leo.class08_12;
+package leo.class12;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/src/leo/class08_12/Node.java b/src/leo/class12/Node.java
similarity index 90%
rename from src/leo/class08_12/Node.java
rename to src/leo/class12/Node.java
index 8d1b555..10fee77 100644
--- a/src/leo/class08_12/Node.java
+++ b/src/leo/class12/Node.java
@@ -1,4 +1,4 @@
-package leo.class08_12;
+package leo.class12;
 
 /**
  * @author Leo
diff --git a/src/leo/class09_13/LowestAncestor.java b/src/leo/class13/LowestAncestor.java
similarity index 99%
rename from src/leo/class09_13/LowestAncestor.java
rename to src/leo/class13/LowestAncestor.java
index d04abd1..5d61f3a 100644
--- a/src/leo/class09_13/LowestAncestor.java
+++ b/src/leo/class13/LowestAncestor.java
@@ -1,4 +1,4 @@
-package leo.class09_13;
+package leo.class13;
 
 /**
  * @author Leo
diff --git a/src/leo/class09_13/LowestLexicography.java b/src/leo/class13/LowestLexicography.java
similarity index 85%
rename from src/leo/class09_13/LowestLexicography.java
rename to src/leo/class13/LowestLexicography.java
index 1e0510e..698c3f2 100644
--- a/src/leo/class09_13/LowestLexicography.java
+++ b/src/leo/class13/LowestLexicography.java
@@ -1,4 +1,4 @@
-package leo.class09_13;
+package leo.class13;
 
 /**
  * @author Leo
diff --git a/src/leo/class09_13/MaxHappy.java b/src/leo/class13/MaxHappy.java
similarity index 99%
rename from src/leo/class09_13/MaxHappy.java
rename to src/leo/class13/MaxHappy.java
index dd7e4ed..060e61d 100644
--- a/src/leo/class09_13/MaxHappy.java
+++ b/src/leo/class13/MaxHappy.java
@@ -1,4 +1,4 @@
-package leo.class09_13;
+package leo.class13;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/src/leo/class09_13/MaxSubBSTHead.java b/src/leo/class13/MaxSubBSTHead.java
similarity index 99%
rename from src/leo/class09_13/MaxSubBSTHead.java
rename to src/leo/class13/MaxSubBSTHead.java
index a6f345e..c26a4be 100644
--- a/src/leo/class09_13/MaxSubBSTHead.java
+++ b/src/leo/class13/MaxSubBSTHead.java
@@ -1,8 +1,7 @@
-package leo.class09_13;
+package leo.class13;
 
 import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.Map;
 
 /**
diff --git a/src/leo/class09_13/Node.java b/src/leo/class13/Node.java
similarity index 90%
rename from src/leo/class09_13/Node.java
rename to src/leo/class13/Node.java
index 9ed3f9f..e0fe135 100644
--- a/src/leo/class09_13/Node.java
+++ b/src/leo/class13/Node.java
@@ -1,4 +1,4 @@
-package leo.class09_13;
+package leo.class13;
 
 /**
  * @author Leo
diff --git a/src/leo/class09_14/BestArrange.java b/src/leo/class14/BestArrange.java
similarity index 98%
rename from src/leo/class09_14/BestArrange.java
rename to src/leo/class14/BestArrange.java
index 6887383..f0301e9 100644
--- a/src/leo/class09_14/BestArrange.java
+++ b/src/leo/class14/BestArrange.java
@@ -1,8 +1,7 @@
-package leo.class09_14;
+package leo.class14;
 
 import java.util.Arrays;
 import java.util.Comparator;
-import java.util.PriorityQueue;
 
 /**
  * @author Leo
diff --git a/src/leo/class09_14/IPO.java b/src/leo/class14/IPO.java
similarity index 98%
rename from src/leo/class09_14/IPO.java
rename to src/leo/class14/IPO.java
index 597bd64..a8668e1 100644
--- a/src/leo/class09_14/IPO.java
+++ b/src/leo/class14/IPO.java
@@ -1,4 +1,4 @@
-package leo.class09_14;
+package leo.class14;
 
 import java.util.Comparator;
 import java.util.PriorityQueue;
diff --git a/src/leo/class09_14/LessMoneySplitGold.java b/src/leo/class14/LessMoneySplitGold.java
similarity index 99%
rename from src/leo/class09_14/LessMoneySplitGold.java
rename to src/leo/class14/LessMoneySplitGold.java
index c0d08a5..050086d 100644
--- a/src/leo/class09_14/LessMoneySplitGold.java
+++ b/src/leo/class14/LessMoneySplitGold.java
@@ -1,4 +1,4 @@
-package leo.class09_14;
+package leo.class14;
 
 import java.util.PriorityQueue;
 
diff --git a/src/leo/class09_14/Light.java b/src/leo/class14/Light.java
similarity index 99%
rename from src/leo/class09_14/Light.java
rename to src/leo/class14/Light.java
index 5d22a6e..b1a35a5 100644
--- a/src/leo/class09_14/Light.java
+++ b/src/leo/class14/Light.java
@@ -1,4 +1,4 @@
-package leo.class09_14;
+package leo.class14;
 
 import java.util.HashSet;
 
diff --git a/src/leo/class09_14/UnionFindClass.java b/src/leo/class14/UnionFindClass.java
similarity index 98%
rename from src/leo/class09_14/UnionFindClass.java
rename to src/leo/class14/UnionFindClass.java
index 32f8e9d..6cae467 100644
--- a/src/leo/class09_14/UnionFindClass.java
+++ b/src/leo/class14/UnionFindClass.java
@@ -1,4 +1,4 @@
-package leo.class09_14;
+package leo.class14;
 
 import java.util.HashMap;
 import java.util.List;
diff --git a/src/leo/class09_15/FriendCircles.java b/src/leo/class15/FriendCircles.java
similarity index 99%
rename from src/leo/class09_15/FriendCircles.java
rename to src/leo/class15/FriendCircles.java
index 844ec77..ff41b24 100644
--- a/src/leo/class09_15/FriendCircles.java
+++ b/src/leo/class15/FriendCircles.java
@@ -1,4 +1,4 @@
-package leo.class09_15;
+package leo.class15;
 
 /**
  * @author Leo
diff --git a/src/leo/class09_15/NumberOfIslands.java b/src/leo/class15/NumberOfIslands.java
similarity index 99%
rename from src/leo/class09_15/NumberOfIslands.java
rename to src/leo/class15/NumberOfIslands.java
index 3dac7cc..6435418 100644
--- a/src/leo/class09_15/NumberOfIslands.java
+++ b/src/leo/class15/NumberOfIslands.java
@@ -1,4 +1,4 @@
-package leo.class09_15;
+package leo.class15;
 
 import java.util.*;
 
diff --git a/src/leo/class09_15/NumberOfIslandsII.java b/src/leo/class15/NumberOfIslandsII.java
similarity index 99%
rename from src/leo/class09_15/NumberOfIslandsII.java
rename to src/leo/class15/NumberOfIslandsII.java
index 8061e41..0a8bdc7 100644
--- a/src/leo/class09_15/NumberOfIslandsII.java
+++ b/src/leo/class15/NumberOfIslandsII.java
@@ -1,4 +1,4 @@
-package leo.class09_15;
+package leo.class15;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/src/leo/class10_16/BFS.java b/src/leo/class16/BFS.java
similarity index 96%
rename from src/leo/class10_16/BFS.java
rename to src/leo/class16/BFS.java
index ba0771f..cd6079c 100644
--- a/src/leo/class10_16/BFS.java
+++ b/src/leo/class16/BFS.java
@@ -1,6 +1,6 @@
-package leo.class10_16;
+package leo.class16;
 
-import leo.class10_16.Graph.Node;
+import leo.class16.Graph.Node;
 
 import java.util.*;
 
diff --git a/src/leo/class10_16/DFS.java b/src/leo/class16/DFS.java
similarity index 96%
rename from src/leo/class10_16/DFS.java
rename to src/leo/class16/DFS.java
index 8a30b47..22e09b5 100644
--- a/src/leo/class10_16/DFS.java
+++ b/src/leo/class16/DFS.java
@@ -1,6 +1,6 @@
-package leo.class10_16;
+package leo.class16;
 
-import leo.class10_16.Graph.Node;
+import leo.class16.Graph.Node;
 
 import java.util.HashSet;
 import java.util.Set;
diff --git a/src/leo/class10_16/Dijkstra.java b/src/leo/class16/Dijkstra.java
similarity index 96%
rename from src/leo/class10_16/Dijkstra.java
rename to src/leo/class16/Dijkstra.java
index 95a452a..ea8b301 100644
--- a/src/leo/class10_16/Dijkstra.java
+++ b/src/leo/class16/Dijkstra.java
@@ -1,4 +1,4 @@
-package leo.class10_16;
+package leo.class16;
 
 /**
  * @author Leo
diff --git a/src/leo/class10_16/Graph/Edge.java b/src/leo/class16/Graph/Edge.java
similarity index 93%
rename from src/leo/class10_16/Graph/Edge.java
rename to src/leo/class16/Graph/Edge.java
index e7735b0..34e732e 100644
--- a/src/leo/class10_16/Graph/Edge.java
+++ b/src/leo/class16/Graph/Edge.java
@@ -1,4 +1,4 @@
-package leo.class10_16.Graph;
+package leo.class16.Graph;
 
 /**
  * @author Leo
diff --git a/src/leo/class10_16/Graph/Graph.java b/src/leo/class16/Graph/Graph.java
similarity index 95%
rename from src/leo/class10_16/Graph/Graph.java
rename to src/leo/class16/Graph/Graph.java
index 96542b7..8c9206c 100644
--- a/src/leo/class10_16/Graph/Graph.java
+++ b/src/leo/class16/Graph/Graph.java
@@ -1,4 +1,4 @@
-package leo.class10_16.Graph;
+package leo.class16.Graph;
 
 import java.util.HashMap;
 import java.util.HashSet;
diff --git a/src/leo/class10_16/Graph/GraphGenerator.java b/src/leo/class16/Graph/GraphGenerator.java
similarity index 96%
rename from src/leo/class10_16/Graph/GraphGenerator.java
rename to src/leo/class16/Graph/GraphGenerator.java
index 65093bf..c276464 100644
--- a/src/leo/class10_16/Graph/GraphGenerator.java
+++ b/src/leo/class16/Graph/GraphGenerator.java
@@ -1,7 +1,4 @@
-package leo.class10_16.Graph;
-
-import java.util.HashSet;
-import java.util.Set;
+package leo.class16.Graph;
 
 /**
  * @author Leo
diff --git a/src/leo/class10_16/Graph/Node.java b/src/leo/class16/Graph/Node.java
similarity index 96%
rename from src/leo/class10_16/Graph/Node.java
rename to src/leo/class16/Graph/Node.java
index 30f75e7..ecc6d8b 100644
--- a/src/leo/class10_16/Graph/Node.java
+++ b/src/leo/class16/Graph/Node.java
@@ -1,4 +1,4 @@
-package leo.class10_16.Graph;
+package leo.class16.Graph;
 
 import java.util.ArrayList;
 
diff --git a/src/leo/class10_16/Kruskal.java b/src/leo/class16/Kruskal.java
similarity index 95%
rename from src/leo/class10_16/Kruskal.java
rename to src/leo/class16/Kruskal.java
index ec80f06..e47c4a0 100644
--- a/src/leo/class10_16/Kruskal.java
+++ b/src/leo/class16/Kruskal.java
@@ -1,8 +1,8 @@
-package leo.class10_16;
+package leo.class16;
 
-import leo.class10_16.Graph.Edge;
-import leo.class10_16.Graph.Graph;
-import leo.class10_16.Graph.Node;
+import leo.class16.Graph.Edge;
+import leo.class16.Graph.Graph;
+import leo.class16.Graph.Node;
 
 import java.util.*;
 
diff --git a/src/leo/class10_16/Prim.java b/src/leo/class16/Prim.java
similarity index 91%
rename from src/leo/class10_16/Prim.java
rename to src/leo/class16/Prim.java
index 65536de..ed47b53 100644
--- a/src/leo/class10_16/Prim.java
+++ b/src/leo/class16/Prim.java
@@ -1,9 +1,8 @@
-package leo.class10_16;
+package leo.class16;
 
-import com.sun.org.apache.regexp.internal.RE;
-import leo.class10_16.Graph.Edge;
-import leo.class10_16.Graph.Graph;
-import leo.class10_16.Graph.Node;
+import leo.class16.Graph.Edge;
+import leo.class16.Graph.Graph;
+import leo.class16.Graph.Node;
 
 import java.util.HashSet;
 import java.util.PriorityQueue;
diff --git a/src/leo/class10_16/TopologicalOrder.java b/src/leo/class16/TopologicalOrder.java
similarity index 98%
rename from src/leo/class10_16/TopologicalOrder.java
rename to src/leo/class16/TopologicalOrder.java
index f2ace9a..7af27c8 100644
--- a/src/leo/class10_16/TopologicalOrder.java
+++ b/src/leo/class16/TopologicalOrder.java
@@ -1,9 +1,8 @@
-package leo.class10_16;
+package leo.class16;
 
-import leo.class10_16.Graph.Graph;
-import leo.class10_16.Graph.Node;
+import leo.class16.Graph.Graph;
+import leo.class16.Graph.Node;
 
-import java.lang.reflect.Array;
 import java.util.*;
 
 /**
diff --git a/src/leo/class10_17/Dijkstra.java b/src/leo/class17/Dijkstra.java
similarity index 83%
rename from src/leo/class10_17/Dijkstra.java
rename to src/leo/class17/Dijkstra.java
index c623aad..52f8ba9 100644
--- a/src/leo/class10_17/Dijkstra.java
+++ b/src/leo/class17/Dijkstra.java
@@ -1,4 +1,4 @@
-package leo.class10_17;
+package leo.class17;
 
 /**
  * @author Leo
diff --git a/src/leo/class10_17/Edge.java b/src/leo/class17/Edge.java
similarity index 93%
rename from src/leo/class10_17/Edge.java
rename to src/leo/class17/Edge.java
index 085eb5b..d6ece9f 100644
--- a/src/leo/class10_17/Edge.java
+++ b/src/leo/class17/Edge.java
@@ -1,4 +1,4 @@
-package leo.class10_17;
+package leo.class17;
 
 /**
  * @author Leo
diff --git a/src/leo/class10_17/Graph.java b/src/leo/class17/Graph.java
similarity index 86%
rename from src/leo/class10_17/Graph.java
rename to src/leo/class17/Graph.java
index 264a8ad..ae2b56e 100644
--- a/src/leo/class10_17/Graph.java
+++ b/src/leo/class17/Graph.java
@@ -1,6 +1,5 @@
-package leo.class10_17;
+package leo.class17;
 
-import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
 
diff --git a/src/leo/class11_17/Hanoi.java b/src/leo/class17/Hanoi.java
similarity index 97%
rename from src/leo/class11_17/Hanoi.java
rename to src/leo/class17/Hanoi.java
index 6e5518d..090af67 100644
--- a/src/leo/class11_17/Hanoi.java
+++ b/src/leo/class17/Hanoi.java
@@ -1,4 +1,4 @@
-package leo.class11_17;
+package leo.class17;
 
 import class11_17.Code01_Hanoi;
 
diff --git a/src/leo/class10_17/Node.java b/src/leo/class17/Node.java
similarity index 95%
rename from src/leo/class10_17/Node.java
rename to src/leo/class17/Node.java
index 4e0be98..6694104 100644
--- a/src/leo/class10_17/Node.java
+++ b/src/leo/class17/Node.java
@@ -1,4 +1,4 @@
-package leo.class10_17;
+package leo.class17;
 
 import java.util.ArrayList;
 
diff --git a/src/leo/class11_17/PrintStr.java b/src/leo/class17/PrintStr.java
similarity index 99%
rename from src/leo/class11_17/PrintStr.java
rename to src/leo/class17/PrintStr.java
index 4f672d6..e5d7eb0 100644
--- a/src/leo/class11_17/PrintStr.java
+++ b/src/leo/class17/PrintStr.java
@@ -1,6 +1,5 @@
-package leo.class11_17;
+package leo.class17;
 
-import java.nio.file.Path;
 import java.util.*;
 
 /**
diff --git a/src/leo/class11_17/ReverseStackUsingRecursive.java b/src/leo/class17/ReverseStackUsingRecursive.java
similarity index 98%
rename from src/leo/class11_17/ReverseStackUsingRecursive.java
rename to src/leo/class17/ReverseStackUsingRecursive.java
index 3b38d38..9ce998d 100644
--- a/src/leo/class11_17/ReverseStackUsingRecursive.java
+++ b/src/leo/class17/ReverseStackUsingRecursive.java
@@ -1,4 +1,4 @@
-package leo.class11_17;
+package leo.class17;
 
 import java.util.Stack;