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[Lustellz] Week6 solution #1875

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merged 1 commit into from
Sep 1, 2025
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[Lustellz] Week6 solution #1875

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26 changes: 26 additions & 0 deletions valid-parentheses/Lustellz.ts
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Original file line number Diff line number Diff line change
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// https://leetcode.com/problems/valid-parentheses
// Rumtime: 6ms
// Memory: 59.11MB

function isValid(s: string): boolean {
let stack: string[] = [];

for (let i = 0; i < s.length; i++) {
if (["(", "{", "["].includes(s[i])) {
stack.push(s[i]);
} else {
switch (s[i]) {
case ")":
if (stack.pop() !== "(") return false;
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stack이 비어있는 경우에 대한 예외처리를 하지 않아도 괜찮나용?

break;
case "}":
if (stack.pop() !== "{") return false;
break;
case "]":
if (stack.pop() !== "[") return false;
break;
}
}
}
return stack.length === 0;
}