From c0080d20107ef04bf2c786a7224db6d2d46d6054 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EC=A0=95=EB=AA=85=EA=B8=B0?= <jmk101711@yu.ac.kr>
Date: Fri, 23 May 2025 16:01:30 +0900
Subject: [PATCH] 5

---
 jungmyunggi/5.js | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 jungmyunggi/5.js

diff --git a/jungmyunggi/5.js b/jungmyunggi/5.js
new file mode 100644
index 0000000..3ad95c7
--- /dev/null
+++ b/jungmyunggi/5.js
@@ -0,0 +1,28 @@
+/**
+ * @param {string} s
+ * @return {string}
+ */
+var longestPalindrome = function (s) {
+    function helper(s, left, right) {
+        while (left >= 0 && right < s.length && s[left] === s[right]) {
+            left--;
+            right++;
+        }
+        return [left, right];
+    }
+    let answer = [0, 0];
+    for (let i = 0; i < s.length; i++) {
+        const temp1 = helper(s, i, i);
+        const temp2 = helper(s, i, i + 1);
+        let result = [];
+        if (temp1[1] - temp1[0] > temp2[1] - temp2[0]) {
+            result = temp1;
+        } else {
+            result = temp2;
+        }
+
+        if (result[1] - result[0] > answer[1] - answer[0]) answer = result;
+    }
+
+    return s.slice(answer[0] + 1, answer[1]);
+};