题解 | 扫雷

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int m = in.nextInt();
        int[][] nums = new int[n+2][m+2];
        //初始化
        for(int i=1;i<=n;i++){
            String str = in.next();
            for(int j=1;j<=m;j++){
                if('*'==str.charAt(j-1)){
                    nums[i][j] = 1;
                }
            }
        }
        //判断
        for(int i=1;i<=n;i++){
            for(int j=1;j<=m;j++){
                if(nums[i][j]==1){
                    System.out.print('*');
                }else{
                  int ans = nums[i-1][j-1] + nums[i-1][j]+nums[i-1][j+1]
                          + nums[i][j-1] + nums[i][j+1]
                          + nums[i+1][j-1] + nums[i+1][j]+nums[i+1][j+1];

                  System.out.print(ans);
                }
            }
            System.out.println();
        }

        
    }
}