problem294

README

< Previous 　　　　　　　　　　　　　　　　 Next >

294. Flip Game II (Medium)

You are playing the following Flip Game with your friend: Given a string that contains only these two characters: + and -, you and your friend take turns to flip two consecutive "++" into "--". The game ends when a person can no longer make a move and therefore the other person will be the winner.

Write a function to determine if the starting player can guarantee a win.

Example:

Input: s = "++++"
Output: true 
Explanation: The starting player can guarantee a win by flipping the middle "++" to become "+--+".

Follow up:
Derive your algorithm's runtime complexity.

Related Topics

[Minimax] [Backtracking]

Similar Questions

1. Nim Game (Easy)
2. Flip Game (Easy)
3. Guess Number Higher or Lower II (Medium)
4. Can I Win (Medium)