msb-public-java
/
LeetCode
mirror of https://github.com/yuanguangxin/LeetCode
1
2
Code Issues Projects Releases Wiki Activity

add q32

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pull/6/head
yuanguangxin 5 years ago
parent 962f808cf9
commit f306cb3332
3 changed files with 72 additions and 46 deletions
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79
.idea/workspace.xml
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@ -2,8 +2,7 @@
<project version="4"> <project version="4">
<component name="ChangeListManager"> <component name="ChangeListManager">
<list default="true" id="af7ffdf2-4ddc-4ed6-8222-60ed5acbc2ed" name="Default Changelist" comment=""> <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/栈相关/q32_最长有效括号/Solution.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 beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" 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" /> <change beforePath="$PROJECT_DIR$/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
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@ -64,7 +63,7 @@
<property name="project.structure.last.edited" value="Modules" /> <property name="project.structure.last.edited" value="Modules" />
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<key name="CopyClassDialog.RECENTS_KEY"> <key name="CopyClassDialog.RECENTS_KEY">
@ -81,20 +80,7 @@
<recent name="$PROJECT_DIR$/src/q206/f1" /> <recent name="$PROJECT_DIR$/src/q206/f1" />
</key> </key>
</component> </component>
<component name="RunManager" selected="Application.Solution (5)"> <component name="RunManager" selected="Application.Solution (6)">
<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>
<configuration name="Solution (2)" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true"> <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" /> <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" /> <module name="LeetCode" />
@ -147,12 +133,12 @@
<option name="Make" enabled="true" /> <option name="Make" enabled="true" />
</method> </method>
</configuration> </configuration>
<configuration name="Solution" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true"> <configuration name="Solution (6)" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="q10_正则表达式匹配.Solution" /> <option name="MAIN_CLASS_NAME" value="栈相关.q32_最长有效括号.Solution" />
<module name="LeetCode" /> <module name="LeetCode" />
<extension name="coverage"> <extension name="coverage">
<pattern> <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" /> <option name="ENABLED" value="true" />
</pattern> </pattern>
</extension> </extension>
@ -227,11 +213,11 @@
</configuration> </configuration>
<recent_temporary> <recent_temporary>
<list> <list>
<item itemvalue="Application.Solution (6)" />
<item itemvalue="Application.Solution (5)" /> <item itemvalue="Application.Solution (5)" />
<item itemvalue="Application.Solution (4)" /> <item itemvalue="Application.Solution (4)" />
<item itemvalue="Application.Solution (3)" /> <item itemvalue="Application.Solution (3)" />
<item itemvalue="Application.Solution (2)" /> <item itemvalue="Application.Solution (2)" />
<item itemvalue="Application.Solution (1)" />
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</recent_temporary> </recent_temporary>
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@ -290,14 +276,8 @@
<workItem from="1584977075044" duration="499000" /> <workItem from="1584977075044" duration="499000" />
<workItem from="1585037684584" duration="753000" /> <workItem from="1585037684584" duration="753000" />
<workItem from="1585041029099" duration="2193000" /> <workItem from="1585041029099" duration="2193000" />
<workItem from="1585219892120" duration="222000" /> <workItem from="1585219892120" duration="917000" />
</task> <workItem from="1585223904505" duration="2190000" />
<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>
</task> </task>
<task id="LOCAL-00006" summary="add q21"> <task id="LOCAL-00006" summary="add q21">
<created>1580409713059</created> <created>1580409713059</created>
@ -635,7 +615,14 @@
<option name="project" value="LOCAL" /> <option name="project" value="LOCAL" />
<updated>1585108622120</updated> <updated>1585108622120</updated>
</task> </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>
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<option name="localTasksCounter" value="55" />
<servers /> <servers />
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@ -688,7 +675,6 @@
</option> </option>
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<component name="VcsManagerConfiguration"> <component name="VcsManagerConfiguration">
<MESSAGE value="add q110/q450/q701" />
<MESSAGE value="add q1277" /> <MESSAGE value="add q1277" />
<MESSAGE value="add q42" /> <MESSAGE value="add q42" />
<MESSAGE value="update md" /> <MESSAGE value="update md" />
@ -713,7 +699,8 @@
<MESSAGE value="update Rocket.md" /> <MESSAGE value="update Rocket.md" />
<MESSAGE value="add q945" /> <MESSAGE value="add q945" />
<MESSAGE value="add q70/q104" /> <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" />
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@ -728,35 +715,35 @@
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1
README.md
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@ -58,6 +58,7 @@
### 栈相关 ### 栈相关
* [q20_有效的括号](/src/栈相关/q20_有效的括号) * [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) * [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) * [q316_去除重复字母](/src/栈相关/q316_去除重复字母)

38
src/栈相关/q32_最长有效括号/Solution.java
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@ -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(")()())"));
}
}
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