Merge pull request #2153 from CodingTestStudy2/정진영

[정진영] 2026/10/09

Author: github-actions[bot]

leetcode3/정진영/20. Valid Parentheses

@@ -0,0 +1,25 @@
+/**
+ * @param {string} s
+ * @return {boolean}
+ */
+var isValid = function(s) {
+    const arr = [];
+
+    for (let i = 0; i<s.length; i++){
+        if(s[i] == '(' || s[i] == '{' || s[i] == '['){
+            arr.push(s[i]);
+        } else {
+            if (s[i] == ')' && arr[arr.length-1] !== '('){
+                return false;
+            } else if (s[i] == '}' && arr[arr.length-1] !== '{'){
+                return false;
+            } else if (s[i] == ']' && arr[arr.length-1] !== '['){
+                return false;
+            }
+            arr.pop();
+        }
+    }
+    
+    return arr.length == 0;
+};
+