题解

#include <bits/stdc++.h>
using namespace std;
int main(){
    int n,m;
    cin >> n >> m;
    string a[n];
    vector<vector<int>> b(n,vector<int>(m,0));
    for (int i=0;i<n;i++)cin >> a[i];
    for (int i=0;i<n;i++){
        for (int j=0;j<m;j++){
            if (a[i][j] != '*'){
            if (i > 0 && a[i-1][j] == '*')b[i][j]++;
            if (j > 0 && a[i][j-1] == '*')b[i][j]++;
            if (i < n-1 && a[i+1][j] == '*')b[i][j]++;
            if (j < m-1 && a[i][j+1] == '*')b[i][j]++;
            if (i > 0 && j > 0 && a[i-1][j-1] == '*')b[i][j]++;
            if (j > 0 && i < n-1 && a[i+1][j-1] == '*')b[i][j]++;
            if (i < n-1 && j < m-1 && a[i+1][j+1] == '*')b[i][j]++;
            if (j < m-1  && i > 0&& a[i-1][j+1] == '*')b[i][j]++;}
        }
    }for (int i=0;i<n;i++){
        for (int j=0;j<m;j++){
            if (a[i][j] != '*'){
                cout << b[i][j];
            }else cout << '*';
        }cout << endl;
    }
    return 0;
}