Jul 21

Author: siddydutta

2025-07-July-LeetCoding-Challenge/Delete Characters to Make Fancy String.py

@@ -0,0 +1,28 @@
+class Solution:
+    def makeFancyString(self, s: str) -> str:
+        prev_char, curr_count = None, 0
+        result = ''
+        for ch in s:
+            if ch == prev_char:
+                curr_count += 1
+            else:
+                curr_count = 1
+            if curr_count < 3:
+                result += ch
+            prev_char = ch
+        return result
+
+
+def main():
+    s = 'leeetcode'
+    assert Solution().makeFancyString(s) == 'leetcode'
+
+    s = 'aaabaaaa'
+    assert Solution().makeFancyString(s) == 'aabaa'
+
+    s = 'aab'
+    assert Solution().makeFancyString(s) == 'aab'
+
+
+if __name__ == '__main__':
+    main()

2025-07-July-LeetCoding-Challenge/README.md

@@ -23,8 +23,8 @@
 | July 17 | [3202. Find the Maximum Length of Valid Subsequence II](https://leetcode.com/problems/find-the-maximum-length-of-valid-subsequence-ii/) | Medium | Unsolved |
 | July 18 | [2163. Minimum Difference in Sums After Removal of Elements](https://leetcode.com/problems/minimum-difference-in-sums-after-removal-of-elements/) | Hard | Unsolved |
 | July 19 | [1233. Remove Sub-Folders from the Filesystem](https://leetcode.com/problems/remove-sub-folders-from-the-filesystem/) | Medium | Solved |
-| July 20 | []() |  |  |
-| July 21 | []() |  |  |
+| July 20 | [1948. Delete Duplicate Folders in System](https://leetcode.com/problems/delete-duplicate-folders-in-system/) | Hard | Unsolved |
+| July 21 | [1957. Delete Characters to Make Fancy String](https://leetcode.com/problems/delete-characters-to-make-fancy-string/) | Easy | Solved |
 | July 22 | []() |  |  |
 | July 23 | []() |  |  |
 | July 24 | []() |  |  |
@@ -40,6 +40,6 @@
 ## Summary
 | Level  | Problems | Solved | Unsolved |
 | ---    | --- | --- | --- |
-| Easy   | 5 | 5 | 0 |
+| Easy   | 6 | 6 | 0 |
 | Medium | 8 | 7 | 1 |
-| Hard   | 6 | 1 | 5 |
+| Hard   | 7 | 1 | 6 |