Solution: Flip Game
Explore how to solve the Flip Game by generating all valid next states where two consecutive plus signs are flipped to minus signs. This lesson guides you through using backtracking techniques to systematically identify valid moves and create new game states, enhancing your problem-solving skills for combinatorial challenges involving strings.
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Statement
You are playing a Flip Game with a friend.
You are given a string currentState consisting only of the characters '+' and '-'. Players take turns flipping two consecutive "++" into "--". The game ends when a player cannot make a move, at which point the other player wins.
Return all possible states of currentState after performing exactly one valid move. The answer may be returned in any order. If no valid move exists, return an empty list.
Constraints:
currentState.lengthcurrentState[i]is either'+'or'-'
Solution
The main idea is to generate all possible valid next moves by ...