backtracking/crossword_puzzle_solver.py change doc

khanhkhanhlele · khanhkhanhlele · commit 7625d7a1a46a · 2025-11-03T20:25:02.000+07:00
diff --git a/backtracking/crossword_puzzle_solver.py b/backtracking/crossword_puzzle_solver.py
@@ -1,5 +1,8 @@
-# https://www.geeksforgeeks.org/solve-crossword-puzzle/
-
+"""
+Crossword Puzzle Solver using Backtracking.
+Reference:
+https://www.geeksforgeeks.org/solve-crossword-puzzle/
+"""
 
 def is_valid(
     puzzle: list[list[str]], word: str, row: int, col: int, vertical: bool
