Use for loop instead of while in sliding window logic.

Refactored the character addition loop to use a `for` loop instead of a `while` loop, simplifying the control flow. Removed an unnecessary window expansion step, making the code cleaner and more concise without altering the functionality.

Author: nicholasadamou

Sliding Window/minimum_window_substring.py

@@ -27,7 +27,7 @@ def min_window(s: str, t: str) -> str:
     window_counts = defaultdict(int)
     window = ''
 
-    while right < n:
+    for right in range(n):
         # Add one character from the right to the window
         char = s[right]
         window_counts[char] += 1
@@ -54,9 +54,6 @@ def min_window(s: str, t: str) -> str:
             # Move the left pointer forward
             left += 1
 
-        # Expand the window
-        right += 1
-
     if result[0] == float('inf'):
         return ''