diff --git a/code_study/Baekjoon/python/11365.py b/code_study/Baekjoon/python/11365.py
new file mode 100644
index 0000000..bca0fca
--- /dev/null
+++ b/code_study/Baekjoon/python/11365.py
@@ -0,0 +1,8 @@
+import sys
+input = sys.stdin.readline
+res = []
+
+while (s := input().rstrip()) != "END" :
+    res.append(s[::-1])
+
+print("\n".join(res))
\ No newline at end of file
diff --git a/code_study/Baekjoon/ts/1509.ts b/code_study/Baekjoon/ts/1509.ts
new file mode 100644
index 0000000..9c4e891
--- /dev/null
+++ b/code_study/Baekjoon/ts/1509.ts
@@ -0,0 +1,37 @@
+export {};
+const str = require("fs").readFileSync(0).toString().trim();
+const len: number = str.length
+
+let isPalindrom: boolean[][] = Array.from({length : len}, () => new Array(len).fill(false));
+for(let i = 0; i < len; i++) {
+    isPalindrom[i][i] = true;
+    if(i != len - 1 && str[i] === str[i+1]) {
+        isPalindrom[i][i+1] = true;
+    }
+}
+
+for(let l = 3; l <= len; l++) {
+    for(let start = 0; start <= len - l; start++) {
+        const end: number = start + l - 1;
+        
+        if(str[start] === str[end] && isPalindrom[start+1][end-1]) {
+            isPalindrom[start][end] = true;
+        }
+
+    }
+}
+
+let dp: number[] = new Array(len).fill(len);
+
+for(let end = 0; end < len; end++) {
+    for(let start = 0; start <= end; start++) {
+        if(isPalindrom[start][end]) {
+            if(start === 0) dp[end] = 1;
+            else {
+                dp[end] = Math.min(dp[end], dp[start - 1] + 1);
+            }
+        }
+    }
+}
+
+console.log(dp[len-1]);