题解 | #扫雷#
扫雷
https://www.nowcoder.com/practice/d5f277427d9a4cd3ae60ea6c276dddfd
//参考已有题解的，超时是因为调用太多次System.out，换成每行输出，次数从n*m次减少到n次，时间0.4s
import java.util.Scanner;
public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int m = sc.nextInt();
char[][] array = new char[n][m];
for(int i = 0; i < n; i++){
array[i] = sc.next().toCharArray();
}
for(int i = 0; i <n; i++){
for(int j =0; j < m; j++){
if(array[i][j] == '*'){
continue;
}else{
int count = 0;
for(int x = i-1; x <= i+1; x++){
if(x < 0 || x>= n){
continue;
}
for(int y = j-1; y <=j+1; y++){
if(y < 0 || y>= m){
continue;
}else if(array[x][y] == '*'){
count++;
}
}
}
array[i][j] = (char)(count+'0');
}
}
System.out.println(array[i]);
}
}
}
