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[jj7779607] Week6 #903

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Jan 18, 2025
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26 changes: 26 additions & 0 deletions valid-parentheses/limlimjo.js
Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
/**
* @param {string} s
* @return {boolean}
*/
var isValid = function (s) {
// 괄호 관리 스택
const stack = [];

// 여는 괄호, 닫는 괄호 매핑
const brackets = { "(": ")", "{": "}", "[": "]" };

// for문 돌며 확인
for (let i of s) {
// 여는 괄호일 경우
if (brackets[i]) {
stack.push(brackets[i]);
// 닫는 괄호일 경우
} else if (i !== stack.pop()) {
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js에서는 스택이 비었을 때, stack.pop() 사용의 리턴 결과가 어떻게 되나요??

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undefined를 반환하게 됩니다. 스택이 비었을 때를 고려하지 못했는데 확인 감사합니다!

return false;
}
}
return true;
};

// 시간복잡도: O(n)
// 공간복잡도: O(n)
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