How to Solve Find Winner on a Tic Tac Toe Game Problem
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Find Winner on a Tic Tac Toe Game
Tic-tac-toe is played by two players A and B on a 3 x 3 grid. The rules of Tic-Tac-Toe are: Players take turns placing characters into empty squares ' '. The first player A always places 'X' character...
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Understanding the Find Winner on a Tic Tac Toe Game Problem
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Problem Statement
Tic-tac-toe is played by two players A and B on a 3 x 3 grid. The rules of Tic-Tac-Toe are: Players take turns placing characters into empty squares ' '. The first player A always places 'X' characters, while the second player B always places 'O' characters. 'X' and 'O' characters are always placed into empty squares, never on filled ones. The game ends when there are three of the same (non-empty) character filling any row, column, or diagonal. The game also ends if all squares are non-empty. No more moves can be played if the game is over. Given a 2D integer array moves where moves[i] = [rowi, coli] indicates that the ith move will be played on grid[rowi][coli]. return the winner of the game if it exists (A or B). In case the game ends in a draw return "Draw". If there are still movements to play return "Pending". You can assume that moves is valid (i.e., it follows the rules of Tic-Tac-Toe), the grid is initially empty, and A will play first.
Find Winner on a Tic Tac Toe Game
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Examples
moves = [[0,0],[2,0],[1,1],[2,1],[2,2]]"A"A wins, they always play first.
moves = [[0,0],[1,1],[0,1],[0,2],[1,0],[2,0]]"B"B wins.
moves = [[0,0],[1,1],[2,0],[1,0],[1,2],[2,1],[0,1],[0,2],[2,2]]"Draw"The game ends in a draw since there are no moves to make.
Constraints
1 <= moves.length <= 9moves[i].length == 20 <= rowi, coli <= 2There are no repeated elements on moves.moves follow the rules of tic tac toe.How Interview Coder Helps with Leetcode Problems
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