Leetcode Problem 294. Flip Game II

294. Flip Game II

Leetcode Solutions

Backtracking with Memoization

  1. Define a helper function canWin that takes the current state of the game as an argument.
  2. If the current state is in the memoization cache, return the cached result.
  3. Iterate through the current state.
  4. For each pair of consecutive '+' characters, flip them to '--' and call canWin recursively to check if the opponent can win.
  5. If the opponent cannot win, store the result in the cache and return True.
  6. If none of the moves lead to a win for the starting player, store the result in the cache and return False.
  7. The starting player can guarantee a win if the helper function returns True.
UML Thumbnail

Simple Backtracking

Ask Question

Programming Language
image/screenshot of info(optional)
Full Screen
Loading...

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...