From 36d008734766673b767d8dccc55db18e4da04cdd Mon Sep 17 00:00:00 2001
From: yuanguangxin <274841922@qq.com>
Date: Thu, 26 Mar 2020 22:49:55 +0800
Subject: [PATCH] add q61

---
 .idea/workspace.xml                           | 61 ++++++++++---------
 README.md                                     |  1 +
 .../q61_旋转链表/ListNode.java            | 10 +++
 .../q61_旋转链表/Solution.java            | 31 ++++++++++
 4 files changed, 73 insertions(+), 30 deletions(-)
 create mode 100644 src/链表操作/q61_旋转链表/ListNode.java
 create mode 100644 src/链表操作/q61_旋转链表/Solution.java

diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index b71213d..248e887 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -1,8 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ChangeListManager">
-    <list default="true" id="af7ffdf2-4ddc-4ed6-8222-60ed5acbc2ed" name="Default Changelist" comment="add q64">
-      <change afterPath="$PROJECT_DIR$/src/栈相关/q155_最小栈/MinStack.java" afterDir="false" />
+    <list default="true" id="af7ffdf2-4ddc-4ed6-8222-60ed5acbc2ed" name="Default Changelist" comment="">
+      <change afterPath="$PROJECT_DIR$/src/链表操作/q61_旋转链表/ListNode.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/src/链表操作/q61_旋转链表/Solution.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
     </list>
@@ -67,11 +68,11 @@
   </component>
   <component name="RecentsManager">
     <key name="CopyClassDialog.RECENTS_KEY">
+      <recent name="链表操作.q61_旋转链表" />
       <recent name="链表操作.q19_删除链表的倒数第N个节点" />
       <recent name="递归.q104_二叉树的最大深度" />
       <recent name="快慢指针遍历.q876_链表的中间结点" />
       <recent name="递归.q226_翻转二叉树" />
-      <recent name="链表操作.q138_复制带随机指针的链表.f2" />
     </key>
     <key name="CopyFile.RECENT_KEYS">
       <recent name="$PROJECT_DIR$/src/hash相关" />
@@ -264,14 +265,7 @@
       <workItem from="1585037684584" duration="753000" />
       <workItem from="1585041029099" duration="2193000" />
       <workItem from="1585219892120" duration="917000" />
-      <workItem from="1585223904505" duration="6502000" />
-    </task>
-    <task id="LOCAL-00009" summary="add q53">
-      <created>1580714190854</created>
-      <option name="number" value="00009" />
-      <option name="presentableId" value="LOCAL-00009" />
-      <option name="project" value="LOCAL" />
-      <updated>1580714190854</updated>
+      <workItem from="1585223904505" duration="7051000" />
     </task>
     <task id="LOCAL-00010" summary="add q54">
       <created>1580753759299</created>
@@ -609,7 +603,14 @@
       <option name="project" value="LOCAL" />
       <updated>1585230789181</updated>
     </task>
-    <option name="localTasksCounter" value="58" />
+    <task id="LOCAL-00058" summary="add q155">
+      <created>1585232616596</created>
+      <option name="number" value="00058" />
+      <option name="presentableId" value="LOCAL-00058" />
+      <option name="project" value="LOCAL" />
+      <updated>1585232616596</updated>
+    </task>
+    <option name="localTasksCounter" value="59" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -662,7 +663,6 @@
     </option>
   </component>
   <component name="VcsManagerConfiguration">
-    <MESSAGE value="update q10/q746" />
     <MESSAGE value="update q10" />
     <MESSAGE value="update q206" />
     <MESSAGE value="rename package" />
@@ -687,7 +687,8 @@
     <MESSAGE value="add q32" />
     <MESSAGE value="add q34" />
     <MESSAGE value="add q64" />
-    <option name="LAST_COMMIT_MESSAGE" value="add q64" />
+    <MESSAGE value="add q155" />
+    <option name="LAST_COMMIT_MESSAGE" value="add q155" />
   </component>
   <component name="WindowStateProjectService">
     <state x="320" y="115" key="#Inspections" timestamp="1581061018990">
@@ -702,35 +703,35 @@
       <screen x="0" y="0" width="1440" height="900" />
     </state>
     <state x="533" y="166" key="#com.intellij.ide.util.MemberChooser/0.0.1440.900@0.0.1440.900" timestamp="1578548165321" />
-    <state x="303" y="50" key="CommitChangelistDialog2" timestamp="1585232569278">
+    <state x="303" y="50" key="CommitChangelistDialog2" timestamp="1585232616430">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
-    <state x="303" y="50" key="CommitChangelistDialog2/0.0.1440.900@0.0.1440.900" timestamp="1585232569278" />
-    <state x="143" y="78" width="1152" height="720" key="DiffContextDialog" timestamp="1585027870766">
-      <screen x="0" y="0" width="1440" height="900" />
+    <state x="303" y="50" key="CommitChangelistDialog2/0.0.1440.900@0.0.1440.900" timestamp="1585232616430" />
+    <state x="143" y="78" width="1152" height="720" key="DiffContextDialog" timestamp="1585232660808">
+      <screen x="0" y="23" width="1440" height="797" />
     </state>
-    <state x="143" y="78" width="1152" height="720" key="DiffContextDialog/0.0.1440.900@0.0.1440.900" timestamp="1585027870766" />
+    <state x="143" y="78" width="1152" height="720" key="DiffContextDialog/0.0.1440.900@0.0.1440.900" timestamp="1585232656095" />
     <state x="144" y="78" width="1152" height="720" key="DiffContextDialog/0.23.1440.793@0.23.1440.793" timestamp="1582714686712" />
-    <state x="144" y="78" width="1152" height="720" key="DiffContextDialog/0.23.1440.797@0.23.1440.797" timestamp="1581927787180" />
-    <state width="1398" height="245" key="GridCell.Tab.0.bottom" timestamp="1585231993155">
+    <state x="143" y="78" width="1152" height="720" key="DiffContextDialog/0.23.1440.797@0.23.1440.797" timestamp="1585232660808" />
+    <state width="1398" height="245" key="GridCell.Tab.0.bottom" timestamp="1585232632438">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
-    <state width="1398" height="245" key="GridCell.Tab.0.bottom/0.0.1440.900@0.0.1440.900" timestamp="1585231993155" />
+    <state width="1398" height="245" key="GridCell.Tab.0.bottom/0.0.1440.900@0.0.1440.900" timestamp="1585232632438" />
     <state width="1398" height="245" key="GridCell.Tab.0.bottom/0.23.1440.797@0.23.1440.797" timestamp="1585228590486" />
-    <state width="1398" height="245" key="GridCell.Tab.0.center" timestamp="1585231993154">
+    <state width="1398" height="245" key="GridCell.Tab.0.center" timestamp="1585232632437">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
-    <state width="1398" height="245" key="GridCell.Tab.0.center/0.0.1440.900@0.0.1440.900" timestamp="1585231993154" />
+    <state width="1398" height="245" key="GridCell.Tab.0.center/0.0.1440.900@0.0.1440.900" timestamp="1585232632437" />
     <state width="1398" height="245" key="GridCell.Tab.0.center/0.23.1440.797@0.23.1440.797" timestamp="1585228590484" />
-    <state width="1398" height="245" key="GridCell.Tab.0.left" timestamp="1585231993154">
+    <state width="1398" height="245" key="GridCell.Tab.0.left" timestamp="1585232632437">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
-    <state width="1398" height="245" key="GridCell.Tab.0.left/0.0.1440.900@0.0.1440.900" timestamp="1585231993154" />
+    <state width="1398" height="245" key="GridCell.Tab.0.left/0.0.1440.900@0.0.1440.900" timestamp="1585232632437" />
     <state width="1398" height="245" key="GridCell.Tab.0.left/0.23.1440.797@0.23.1440.797" timestamp="1585228590483" />
-    <state width="1398" height="245" key="GridCell.Tab.0.right" timestamp="1585231993155">
+    <state width="1398" height="245" key="GridCell.Tab.0.right" timestamp="1585232632438">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
-    <state width="1398" height="245" key="GridCell.Tab.0.right/0.0.1440.900@0.0.1440.900" timestamp="1585231993155" />
+    <state width="1398" height="245" key="GridCell.Tab.0.right/0.0.1440.900@0.0.1440.900" timestamp="1585232632438" />
     <state width="1398" height="245" key="GridCell.Tab.0.right/0.23.1440.797@0.23.1440.797" timestamp="1585228590484" />
     <state width="1398" height="303" key="GridCell.Tab.1.bottom" timestamp="1585228962390">
       <screen x="0" y="0" width="1440" height="900" />
@@ -760,10 +761,10 @@
       <screen x="0" y="0" width="1440" height="900" />
     </state>
     <state x="221" y="63" key="SettingsEditor/0.0.1440.900@0.0.1440.900" timestamp="1585223890241" />
-    <state x="320" y="190" key="Vcs.Push.Dialog.v2" timestamp="1585230790365">
+    <state x="320" y="190" key="Vcs.Push.Dialog.v2" timestamp="1585232618177">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
-    <state x="320" y="190" key="Vcs.Push.Dialog.v2/0.0.1440.900@0.0.1440.900" timestamp="1585230790365" />
+    <state x="320" y="190" key="Vcs.Push.Dialog.v2/0.0.1440.900@0.0.1440.900" timestamp="1585232618177" />
     <state x="100" y="100" width="1240" height="700" key="com.intellij.history.integration.ui.views.DirectoryHistoryDialog" timestamp="1581744794182">
       <screen x="0" y="23" width="1440" height="797" />
     </state>
diff --git a/README.md b/README.md
index 846f3a2..079abf6 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,7 @@
 
 * [q2_两数相加](/src/链表操作/q2_两数相加)
 * [q19_删除链表的倒数第N个节点](/src/链表操作/q19_删除链表的倒数第N个节点)
+* [q61_旋转链表](/src/链表操作/q61_旋转链表)
 * [q138_复制带随机指针的链表](/src/链表操作/q138_复制带随机指针的链表)
 * [q206_反转链表](/src/链表操作/q206_反转链表)
 
diff --git a/src/链表操作/q61_旋转链表/ListNode.java b/src/链表操作/q61_旋转链表/ListNode.java
new file mode 100644
index 0000000..2254184
--- /dev/null
+++ b/src/链表操作/q61_旋转链表/ListNode.java
@@ -0,0 +1,10 @@
+package 链表操作.q61_旋转链表;
+
+public class ListNode {
+    int val;
+    ListNode next;
+
+    ListNode(int x) {
+        val = x;
+    }
+}
diff --git a/src/链表操作/q61_旋转链表/Solution.java b/src/链表操作/q61_旋转链表/Solution.java
new file mode 100644
index 0000000..f417124
--- /dev/null
+++ b/src/链表操作/q61_旋转链表/Solution.java
@@ -0,0 +1,31 @@
+package 链表操作.q61_旋转链表;
+
+/**
+ * 先连接成环再找断点 o(n)
+ */
+public class Solution {
+
+    public ListNode rotateRight(ListNode head, int k) {
+        if (head == null) {
+            return null;
+        }
+        if (head.next == null) {
+            return head;
+        }
+
+        ListNode oldTail = head;
+        int n;
+        for (n = 1; oldTail.next != null; n++) {
+            oldTail = oldTail.next;
+        }
+        oldTail.next = head;
+        ListNode newTail = head;
+        for (int i = 0; i < n - k % n - 1; i++) {
+            newTail = newTail.next;
+        }
+        ListNode newHead = newTail.next;
+        newTail.next = null;
+
+        return newHead;
+    }
+}