Solution: Flip Game
Explore the backtracking technique to solve the Flip Game problem, where you generate all valid next moves by flipping '++' to '--' in a string. Understand the approach to systematically create new states and analyze time and space complexity involved.
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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 ...