Tic-tac-toe is played by two players A
and B
on a 3 x 3
grid. The rules of Tic-Tac-Toe are:
' '
.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.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.
Example 1:
Input: moves = [[0,0],[2,0],[1,1],[2,1],[2,2]] Output: "A" Explanation: A wins, they always play first.
Example 2:
Input: moves = [[0,0],[1,1],[0,1],[0,2],[1,0],[2,0]] Output: "B" Explanation: B wins.
Example 3:
Input: moves = [[0,0],[1,1],[2,0],[1,0],[1,2],[2,1],[0,1],[0,2],[2,2]] Output: "Draw" Explanation: The game ends in a draw since there are no moves to make.
Constraints:
1 <= moves.length <= 9
moves[i].length == 2
0 <= rowi, coli <= 2
moves
.moves
follow the rules of tic tac toe.