feat: 문제풀이 추가

Author: JEONGHWANMIN

valid-parentheses/hwanmini.js

@@ -0,0 +1,39 @@
+// 시간복잡도: O(n)
+// 공간복잡도: O(n)
+
+/**
+ * @param {string} s
+ * @return {boolean}
+ */
+var isValid = function(s) {
+    if (s.length % 2 !== 0) return false
+
+   const stack = []
+
+    const opener = {
+        "(" : ")",
+        "{": "}",
+        "[": "]"
+    }
+
+    for (let i = 0 ; i < s.length; i++) {
+        if (s[i] in opener) {
+            stack.push(s[i]);
+        } else {
+            if (opener[stack.at(-1)] === s[i]) {
+                stack.pop()
+            } else {
+                return false
+            }
+        }
+    }
+
+
+    return stack.length === 0
+};
+
+console.log(isValid("()")); // true
+console.log(isValid("()[]{}")); // true
+console.log(isValid("(]")); // false
+console.log(isValid("([])")); // true
+console.log(isValid("([}}])")); // true