[LC] 348. Design Tic-Tac-Toe
Design a Tic-tac-toe game that is played between two players on a nx n grid.
You may assume the following rules:
- A move is guaranteed to be valid and is placed on an empty block.
- Once a winning condition is reached, no more moves is allowed.
- A player who succeeds in placing n of their marks in a horizontal, vertical, or diagonal row wins the game.
class TicTacToe { /** Initialize your data structure here. */ int[] rows; int[] cols; int diagnal; int antidiagnal; int size; public TicTacToe(int n) { this.rows = new int[n]; this.cols = new int[n]; this.size = n; } /** Player {player} makes a move at ({row}, {col}). @param row The row of the board. @param col The column of the board. @param player The player, can be either 1 or 2. @return The current winning condition, can be either: 0: No one wins. 1: Player 1 wins. 2: Player 2 wins. */ public int move(int row, int col, int player) { int toAdd = player == 1 ? 1 : -1; rows[row] += toAdd; cols[col] += toAdd; if (row == col) { diagnal += toAdd; } if (row + col + 1 == size) { antidiagnal += toAdd; } // need to use Math.abs to consider player2 if (Math.abs(rows[row]) == size || Math.abs(cols[col]) == size || Math.abs(diagnal) == size || Math.abs(antidiagnal) == size) { return player; } return 0; } } /** * Your TicTacToe object will be instantiated and called as such: * TicTacToe obj = new TicTacToe(n); * int param_1 = obj.move(row,col,player); */