From d9f4ad000ebcccc7fcd27b16d30bd58fa1053b69 Mon Sep 17 00:00:00 2001
From: sangbeenmoon <moon.sb@navercorp.com>
Date: Fri, 24 Apr 2026 21:55:23 +0900
Subject: [PATCH] tried longest-repeating-char-replacement.

---
 .../sangbeenmoon.py                              | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 longest-repeating-character-replacement/sangbeenmoon.py

diff --git a/longest-repeating-character-replacement/sangbeenmoon.py b/longest-repeating-character-replacement/sangbeenmoon.py
new file mode 100644
index 000000000..ce5218128
--- /dev/null
+++ b/longest-repeating-character-replacement/sangbeenmoon.py
@@ -0,0 +1,16 @@
+class Solution:
+    def characterReplacement(self, s: str, k: int) -> int:
+        freq = {}
+        left = 0
+        ans = 0
+
+        for right in range(len(s)):
+            freq[s[right]] = freq.get(s[right], 0) + 1
+            
+            while (right - left + 1) - max(freq.values()) > k:
+                freq[s[left]] -= 1
+                left += 1
+            
+            ans = max(ans, right - left + 1)
+
+        return ans