According to the Wikipedia‘s article: "The Game of Life, also known simply as Life, is a cellular automaton devised by the British mathematician John Horton Conway in 1970."
Given a board with m by n cells, each cell has an initial state live (1) or dead (0). Each cell interacts with its eight neighbors (horizontal, vertical, diagonal) using the following four rules (taken from the above Wikipedia article):
Write a function to compute the next state (after one update) of the board given its current state. The next state is created by applying the above rules simultaneously to every cell in the current state, where births and deaths occur simultaneously.
Example:
Input:
[
[0,1,0],
[0,0,1],
[1,1,1],
[0,0,0]
]
Output:
[
[0,0,0],
[1,0,1],
[0,1,1],
[0,1,0]
]
Follow up:
public class Solution { public void gameOfLife(int[][] board) { int m = board.length, n = board[0].length; for(int i = 0; i < m; i++){ for(int j = 0; j < n; j++){ int lives = 0; // 判断上边 if(i > 0){ lives += board[i - 1][j] == 1 || board[i - 1][j] == 2 ? 1 : 0; } // 判断左边 if(j > 0){ lives += board[i][j - 1] == 1 || board[i][j - 1] == 2 ? 1 : 0; } // 判断下边 if(i < m - 1){ lives += board[i + 1][j] == 1 || board[i + 1][j] == 2 ? 1 : 0; } // 判断右边 if(j < n - 1){ lives += board[i][j + 1] == 1 || board[i][j + 1] == 2 ? 1 : 0; } // 判断左上角 if(i > 0 && j > 0){ lives += board[i - 1][j - 1] == 1 || board[i - 1][j - 1] == 2 ? 1 : 0; } //判断右下角 if(i < m - 1 && j < n - 1){ lives += board[i + 1][j + 1] == 1 || board[i + 1][j + 1] == 2 ? 1 : 0; } // 判断右上角 if(i > 0 && j < n - 1){ lives += board[i - 1][j + 1] == 1 || board[i - 1][j + 1] == 2 ? 1 : 0; } // 判断左下角 if(i < m - 1 && j > 0){ lives += board[i + 1][j - 1] == 1 || board[i + 1][j - 1] == 2 ? 1 : 0; } // 根据周边存活数量更新当前点，结果是0和1的情况不用更新 if(board[i][j] == 0 && lives == 3){ board[i][j] = 3; } else if(board[i][j] == 1){ if(lives < 2 || lives > 3) board[i][j] = 2; } } } // 解码 for(int i = 0; i < m; i++){ for(int j = 0; j < n; j++){ board[i][j] = board[i][j] % 2; } } } }
https://wdxtub.com/interview/14520595471005.html
碉堡，用0，1，2，3来存放可能发生的四种状态
原文：https://www.cnblogs.com/wentiliangkaihua/p/11769447.html