From f306cb33328aeae344accf4d6adf8dd059ca6294 Mon Sep 17 00:00:00 2001
From: yuanguangxin <274841922@qq.com>
Date: Thu, 26 Mar 2020 20:38:12 +0800
Subject: [PATCH] add q32

---
 .idea/workspace.xml                           | 79 ++++++++-----------
 README.md                                     |  1 +
 .../q32_最长有效括号/Solution.java      | 38 +++++++++
 3 files changed, 72 insertions(+), 46 deletions(-)
 create mode 100644 src/栈相关/q32_最长有效括号/Solution.java

diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index d5780ba..3fb544b 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -2,8 +2,7 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="af7ffdf2-4ddc-4ed6-8222-60ed5acbc2ed" name="Default Changelist" comment="">
-      <change afterPath="$PROJECT_DIR$/src/链表操作/q19_删除链表的倒数第N个节点/ListNode.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/链表操作/q19_删除链表的倒数第N个节点/Solution.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/src/栈相关/q32_最长有效括号/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>
@@ -64,7 +63,7 @@
     <property name="project.structure.last.edited" value="Modules" />
     <property name="project.structure.proportion" value="0.15" />
     <property name="project.structure.side.proportion" value="0.2" />
-    <property name="settings.editor.selected.configurable" value="MavenSettings" />
+    <property name="settings.editor.selected.configurable" value="preferences.pluginManager" />
   </component>
   <component name="RecentsManager">
     <key name="CopyClassDialog.RECENTS_KEY">
@@ -81,20 +80,7 @@
       <recent name="$PROJECT_DIR$/src/q206/f1" />
     </key>
   </component>
-  <component name="RunManager" selected="Application.Solution (5)">
-    <configuration name="Solution (1)" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
-      <option name="MAIN_CLASS_NAME" value="hash相关.q1_两数之和.f1.Solution" />
-      <module name="LeetCode" />
-      <extension name="coverage">
-        <pattern>
-          <option name="PATTERN" value="hash相关.q1_两数之和.f1.*" />
-          <option name="ENABLED" value="true" />
-        </pattern>
-      </extension>
-      <method v="2">
-        <option name="Make" enabled="true" />
-      </method>
-    </configuration>
+  <component name="RunManager" selected="Application.Solution (6)">
     <configuration name="Solution (2)" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
       <option name="MAIN_CLASS_NAME" value="双指针遍历.q121_买卖股票的最佳时机.Solution" />
       <module name="LeetCode" />
@@ -147,12 +133,12 @@
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="Solution" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
-      <option name="MAIN_CLASS_NAME" value="q10_正则表达式匹配.Solution" />
+    <configuration name="Solution (6)" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
+      <option name="MAIN_CLASS_NAME" value="栈相关.q32_最长有效括号.Solution" />
       <module name="LeetCode" />
       <extension name="coverage">
         <pattern>
-          <option name="PATTERN" value="q10_正则表达式匹配.*" />
+          <option name="PATTERN" value="栈相关.q32_最长有效括号.*" />
           <option name="ENABLED" value="true" />
         </pattern>
       </extension>
@@ -227,11 +213,11 @@
     </configuration>
     <recent_temporary>
       <list>
+        <item itemvalue="Application.Solution (6)" />
         <item itemvalue="Application.Solution (5)" />
         <item itemvalue="Application.Solution (4)" />
         <item itemvalue="Application.Solution (3)" />
         <item itemvalue="Application.Solution (2)" />
-        <item itemvalue="Application.Solution (1)" />
       </list>
     </recent_temporary>
   </component>
@@ -290,14 +276,8 @@
       <workItem from="1584977075044" duration="499000" />
       <workItem from="1585037684584" duration="753000" />
       <workItem from="1585041029099" duration="2193000" />
-      <workItem from="1585219892120" duration="222000" />
-    </task>
-    <task id="LOCAL-00005" summary="add q14/q16/q20">
-      <created>1580395653122</created>
-      <option name="number" value="00005" />
-      <option name="presentableId" value="LOCAL-00005" />
-      <option name="project" value="LOCAL" />
-      <updated>1580395653122</updated>
+      <workItem from="1585219892120" duration="917000" />
+      <workItem from="1585223904505" duration="2190000" />
     </task>
     <task id="LOCAL-00006" summary="add q21">
       <created>1580409713059</created>
@@ -635,7 +615,14 @@
       <option name="project" value="LOCAL" />
       <updated>1585108622120</updated>
     </task>
-    <option name="localTasksCounter" value="54" />
+    <task id="LOCAL-00054" summary="add q19">
+      <created>1585220219370</created>
+      <option name="number" value="00054" />
+      <option name="presentableId" value="LOCAL-00054" />
+      <option name="project" value="LOCAL" />
+      <updated>1585220219370</updated>
+    </task>
+    <option name="localTasksCounter" value="55" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -688,7 +675,6 @@
     </option>
   </component>
   <component name="VcsManagerConfiguration">
-    <MESSAGE value="add q110/q450/q701" />
     <MESSAGE value="add q1277" />
     <MESSAGE value="add q42" />
     <MESSAGE value="update md" />
@@ -713,7 +699,8 @@
     <MESSAGE value="update Rocket.md" />
     <MESSAGE value="add q945" />
     <MESSAGE value="add q70/q104" />
-    <option name="LAST_COMMIT_MESSAGE" value="add q70/q104" />
+    <MESSAGE value="add q19" />
+    <option name="LAST_COMMIT_MESSAGE" value="add q19" />
   </component>
   <component name="WindowStateProjectService">
     <state x="320" y="115" key="#Inspections" timestamp="1581061018990">
@@ -728,35 +715,35 @@
       <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="1585108621969">
+    <state x="303" y="50" key="CommitChangelistDialog2" timestamp="1585220219177">
       <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="1585108621969" />
+    <state x="303" y="50" key="CommitChangelistDialog2/0.0.1440.900@0.0.1440.900" timestamp="1585220219177" />
     <state x="143" y="78" width="1152" height="720" key="DiffContextDialog" timestamp="1585027870766">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
     <state x="143" y="78" width="1152" height="720" key="DiffContextDialog/0.0.1440.900@0.0.1440.900" timestamp="1585027870766" />
     <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="236" key="GridCell.Tab.0.bottom" timestamp="1583494105225">
+    <state width="1398" height="245" key="GridCell.Tab.0.bottom" timestamp="1585224543864">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
-    <state width="1398" height="236" key="GridCell.Tab.0.bottom/0.0.1440.900@0.0.1440.900" timestamp="1583494105225" />
+    <state width="1398" height="245" key="GridCell.Tab.0.bottom/0.0.1440.900@0.0.1440.900" timestamp="1585224543864" />
     <state width="1398" height="177" key="GridCell.Tab.0.bottom/0.23.1440.797@0.23.1440.797" timestamp="1581533895880" />
-    <state width="1398" height="236" key="GridCell.Tab.0.center" timestamp="1583494105224">
+    <state width="1398" height="245" key="GridCell.Tab.0.center" timestamp="1585224543863">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
-    <state width="1398" height="236" key="GridCell.Tab.0.center/0.0.1440.900@0.0.1440.900" timestamp="1583494105224" />
+    <state width="1398" height="245" key="GridCell.Tab.0.center/0.0.1440.900@0.0.1440.900" timestamp="1585224543863" />
     <state width="1398" height="177" key="GridCell.Tab.0.center/0.23.1440.797@0.23.1440.797" timestamp="1581533895878" />
-    <state width="1398" height="236" key="GridCell.Tab.0.left" timestamp="1583494105223">
+    <state width="1398" height="245" key="GridCell.Tab.0.left" timestamp="1585224543862">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
-    <state width="1398" height="236" key="GridCell.Tab.0.left/0.0.1440.900@0.0.1440.900" timestamp="1583494105223" />
+    <state width="1398" height="245" key="GridCell.Tab.0.left/0.0.1440.900@0.0.1440.900" timestamp="1585224543862" />
     <state width="1398" height="177" key="GridCell.Tab.0.left/0.23.1440.797@0.23.1440.797" timestamp="1581533895878" />
-    <state width="1398" height="236" key="GridCell.Tab.0.right" timestamp="1583494105225">
+    <state width="1398" height="245" key="GridCell.Tab.0.right" timestamp="1585224543863">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
-    <state width="1398" height="236" key="GridCell.Tab.0.right/0.0.1440.900@0.0.1440.900" timestamp="1583494105225" />
+    <state width="1398" height="245" key="GridCell.Tab.0.right/0.0.1440.900@0.0.1440.900" timestamp="1585224543863" />
     <state width="1398" height="177" key="GridCell.Tab.0.right/0.23.1440.797@0.23.1440.797" timestamp="1581533895879" />
     <state width="1398" height="204" key="GridCell.Tab.1.bottom" timestamp="1581745235895">
       <screen x="0" y="0" width="1440" height="900" />
@@ -782,14 +769,14 @@
       <screen x="0" y="0" width="1440" height="900" />
     </state>
     <state x="431" y="173" key="MultipleFileMergeDialog/0.0.1440.900@0.0.1440.900" timestamp="1582971939233" />
-    <state x="221" y="63" key="SettingsEditor" timestamp="1583244442349">
+    <state x="221" y="63" key="SettingsEditor" timestamp="1585223890241">
       <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="1583244442349" />
-    <state x="320" y="190" key="Vcs.Push.Dialog.v2" timestamp="1585108623353">
+    <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="1585220220623">
       <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="1585108623353" />
+    <state x="320" y="190" key="Vcs.Push.Dialog.v2/0.0.1440.900@0.0.1440.900" timestamp="1585220220623" />
     <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 f97f646..a80a1f7 100644
--- a/README.md
+++ b/README.md
@@ -58,6 +58,7 @@
 ### 栈相关
 
 * [q20_有效的括号](/src/栈相关/q20_有效的括号)
+* [q32_最长有效括号](/src/栈相关/q32_最长有效括号)
 * [q224_基本计算器](/src/栈相关/q224_基本计算器)
 * [q316_去除重复字母](/src/栈相关/q316_去除重复字母)
 
diff --git a/src/栈相关/q32_最长有效括号/Solution.java b/src/栈相关/q32_最长有效括号/Solution.java
new file mode 100644
index 0000000..bd07506
--- /dev/null
+++ b/src/栈相关/q32_最长有效括号/Solution.java
@@ -0,0 +1,38 @@
+package 栈相关.q32_最长有效括号;
+
+import java.util.Stack;
+
+/**
+ * 利用索引栈 o(n)
+ */
+public class Solution {
+
+    public int longestValidParentheses(String s) {
+        if (s == null || s.length() < 2) {
+            return 0;
+        }
+
+        int maxLen = 0;
+        Stack<Integer> stack = new Stack<>();
+        stack.push(-1);
+        for (int i = 0; i < s.length(); i++) {
+            char temp = s.charAt(i);
+            if (temp == '(') {
+                stack.push(i);
+            } else {
+                stack.pop();
+                if (stack.empty()) {
+                    stack.push(i);
+                } else {
+                    maxLen = Math.max(maxLen, i - stack.peek());
+                }
+            }
+        }
+
+        return maxLen;
+    }
+
+    public static void main(String[] args) {
+        System.out.println(new Solution().longestValidParentheses(")()())"));
+    }
+}