diff --git a/2025-01-January-LeetCoding-Challenge/Minimum Length of String After Operations.py b/2025-01-January-LeetCoding-Challenge/Minimum Length of String After Operations.py
new file mode 100644
index 0000000..249bd19
--- /dev/null
+++ b/2025-01-January-LeetCoding-Challenge/Minimum Length of String After Operations.py	
@@ -0,0 +1,18 @@
+from collections import Counter
+
+
+class Solution:
+    def minimumLength(self, s: str) -> int:
+        return sum(1 if c & 1 else 2 for c in Counter(s).values())
+
+
+def main():
+    s = 'abaacbcbb'
+    assert Solution().minimumLength(s) == 5
+
+    s = 'aa'
+    assert Solution().minimumLength(s) == 2
+
+
+if __name__ == '__main__':
+    main()
diff --git a/2025-01-January-LeetCoding-Challenge/README.md b/2025-01-January-LeetCoding-Challenge/README.md
index 6814999..9db686e 100644
--- a/2025-01-January-LeetCoding-Challenge/README.md
+++ b/2025-01-January-LeetCoding-Challenge/README.md
@@ -15,7 +15,7 @@
 | January 10 | [916. Word Subsets](https://leetcode.com/problems/word-subsets/) | Medium | Solved |
 | January 11 | [1400. Construct K Palindrome Strings](https://leetcode.com/problems/construct-k-palindrome-strings/) | Medium | Solved |
 | January 12 | []() |  |  |
-| January 13 | []() |  |  |
+| January 13 | [3223. Minimum Length of String After Operations](https://leetcode.com/problems/minimum-length-of-string-after-operations/) | Medium | Solved |
 | January 14 | []() |  |  |
 | January 15 | []() |  |  |
 | January 16 | []() |  |  |
@@ -40,5 +40,5 @@
 | Level  | Problems | Solved | Unsolved |
 | ---    | --- | --- | --- |
 | Easy   | 4 | 4 | 0 |
-| Medium | 7 | 7 | 0 |
+| Medium | 8 | 8 | 0 |
 | Hard   | 0 | 0 | 0 |