【[LeetCode] 20. Valid Parentheses_Easy tag: Stack】的更多相关文章

[LeetCode] 20. Valid Parentheses_Easy tag: Stack

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: Open brackets must be closed by the same type of brackets. Open brackets must be closed in the correct…

[Leetcode] 20. Valid Parentheses（Stack）

括号匹配问题,使用栈的特点,匹配则出栈,否则入栈,最后栈为空则全部匹配.代码如下: class Solution { public: bool isValid(string s) { stack<char> T; ;i < s.length();i ++) { ) { T.push(s[i]); } else T.pop(); } if(T.empty()) return true; else return false; } };…

leetcode 20. Valid Parentheses 、32. Longest Valid Parentheses 、

20. Valid Parentheses 错误解法: "[])"就会报错,没考虑到出现')'.']'.'}'时,stack为空的情况,这种情况也无法匹配 class Solution { public: bool isValid(string s) { if(s.empty()) return false; stack<char> st; st.push(s[]); ;i < s.size();i++){ if(s[i] == '(' || s[i] == '['…

Leetcode 20 Valid Parentheses stack的应用

判断括号是否合法 1.用stack存入左括号“([{”,遇到相应的右括号“)]}”就退栈 2.判断stack是否为空,可以判断是否合法 class Solution { public: bool isValid(string s) { stack<char> sc; char in[] ="([{"; char out[] =")]}"; ; i < s.size(); ++i){ ; j < ; ++j){ if(in[j] == s[i]…

[LeetCode] 20. Valid Parentheses 验证括号

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: Open brackets must be closed by the same type of brackets. Open brackets must be closed in the correct…

[LeetCode] 20. Valid Parentheses ☆

转载:https://leetcode.windliang.cc/leetCode-20-Valid%20Parentheses.html 描述 Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: Open brackets must be closed…

[LeetCode] 394. Decode String_Medium tag: stack 666

Given an encoded string, return it's decoded string. The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repeated exactly k times. Note that k is guaranteed to be a positive integer. You may assume th…

[LeetCode] 20. Valid Parentheses 合法括号

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: Open brackets must be closed by the same type of brackets. Open brackets must be closed in the correct…

LeetCode 20 -- Valid Parentheses

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" and "([)]"…

20. Valid Parentheses（stack）

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" and "([)]"…