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# 有效的括号 (opens new window)
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给定一个只包括 '('
,')'
,'{'
,'}'
,'['
,']'
的字符串 s
,判断字符串是否有效。
有效字符串需满足:
- 左括号必须用相同类型的右括号闭合。
- 左括号必须以正确的顺序闭合。
示例 1:
输入:s = "()"
输出:true
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2
示例 2:
输入:s = "()[]{}"
输出:true
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2
示例 3:
输入:s = "(]"
输出:false
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2
示例 4:
输入:s = "([)]"
输出:false
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2
示例 5:
输入:s = "{[]}"
输出:true
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2
提示:
1 <= s.length <= 104
s
仅由括号'()[]{}'
组成
Discussion (opens new window) | Solution (opens new window)https://leetcode-cn.com/problems/valid-parentheses/solution/)
# 解
// @lc code=start
/**
* @param {string} s
* @return {boolean}
*/
var isValid = function (s) {
const ctx = ["()", "[]", "{}"];
while (true) {
for (let i = 0; i < ctx.length; i++) {
s = s.replaceAll(ctx[i], "");
}
if (ctx.every((j) => s.indexOf(j) === -1)) {
break;
}
}
return !s.length;
};
// @lc code=end
// @after-stub-for-debug-begin
module.exports = isValid;
// @after-stub-for-debug-end
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上次更新: 2022/06/05, 20:31:36