feat: 문제풀이 추가

Author: JEONGHWANMIN

valid-palindrome/hwanmini.js

@@ -0,0 +1,29 @@
+// 시간복잡도: O(n)
+// 공간복잡도: O(n)
+
+/**
+ * @param {string} s
+ * @return {boolean}
+ */
+var isPalindrome = function(s) {
+    const strs = s.replace(/[^a-z0-9]/gi, '').toLowerCase();
+
+    let leftIdx = 0;
+    let rightIdx = strs.length - 1
+
+    while (leftIdx <= rightIdx) {
+        if (strs[leftIdx] !== strs[rightIdx]) return false
+
+        leftIdx++
+        rightIdx--
+    }
+
+
+    return true
+};
+
+const s = "A man, a plan, a canal: Panama"
+
+
+console.log(isPalindrome(s))
+