标签：neighbors cell Life state Game 289 live board Any

According to 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."

The board is made up of an m x n grid of cells, where each cell has an initial state: live (represented by a 1) or dead (represented by a 0). Each cell interacts with its eight neighbors (horizontal, vertical, diagonal) using the following four rules (taken from the above Wikipedia article):

1. Any live cell with fewer than two live neighbors dies as if caused by under-population.
2. Any live cell with two or three live neighbors lives on to the next generation.
3. Any live cell with more than three live neighbors dies, as if by over-population.
4. Any dead cell with exactly three live neighbors becomes a live cell, as if by reproduction.

The next state is created by applying the above rules simultaneously to every cell in the current state, where births and deaths occur simultaneously. Given the current state of the m x n grid board, return the next state.

Example 1:

Input: board = [[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]]

Example 2:

Input: board = [[1,1],[1,0]]
Output: [[1,1],[1,1]]

0 - 死亡，1 - 活着，2 - 去死，3 - 会活着。
用 % 来处理细胞的生命，这样状态不会变

public class Solution {
int[][] dir ={{1,-1},{1,0},{1,1},{0,-1},{0,1},{-1,-1},{-1,0},{-1,1}};
public void gameOfLife(int[][] board) {
    for(int i=0;i<board.length;i++){
        for(int j=0;j<board[0].length;j++){
            int live=0;
            for(int[] d:dir){
                if(d[0]+i<0 || d[0]+i>=board.length || d[1]+j<0 || d[1]+j>=board[0].length) continue;
                if(board[d[0]+i][d[1]+j]==1 || board[d[0]+i][d[1]+j]==2) live++;
            }
            if(board[i][j]==0 && live==3) board[i][j]=3;
            if(board[i][j]==1 && (live<2 || live>3)) board[i][j]=2;
        }
    }
    for(int i=0;i<board.length;i++){
        for(int j=0;j<board[0].length;j++){
            board[i][j] %=2;
        }
    }
}
}

标签：neighbors,cell,Life,state,Game,289,live,board,Any
来源： https://www.cnblogs.com/immiao0319/p/15527086.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。