From cde131761ebb1c40f180c0d13e080a1993119bcd Mon Sep 17 00:00:00 2001
From: ssun <56533266+blaire-pi@users.noreply.github.com>
Date: Fri, 2 May 2025 17:16:43 +0900
Subject: [PATCH] Create 1509 yerin.py

---
 BaekJoon/1509/yerin.py | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 BaekJoon/1509/yerin.py

diff --git a/BaekJoon/1509/yerin.py b/BaekJoon/1509/yerin.py
new file mode 100644
index 0000000..6084948
--- /dev/null
+++ b/BaekJoon/1509/yerin.py
@@ -0,0 +1,24 @@
+s = input().strip()
+n = len(s)
+
+is_pal = [[False] * n for _ in range(n)]
+dp = [float('inf')] * (n + 1)
+dp[0] = 0
+
+for i in range(n):
+    is_pal[i][i] = True
+
+for i in range(n - 1):
+    is_pal[i][i + 1] = (s[i] == s[i + 1])
+
+for length in range(3, n + 1):
+    for start in range(n - length + 1):
+        end = start + length - 1
+        is_pal[start][end] = (s[start] == s[end]) and is_pal[start + 1][end - 1]
+
+for i in range(1, n + 1):
+    for j in range(i):
+        if is_pal[j][i - 1]:
+            dp[i] = min(dp[i], dp[j] + 1)
+
+print(dp[n])
\ No newline at end of file