求助！！！！！

#include<bits/stdc++.h>
using namespace std;
int a[110][110];
int sum = 0;
int n , m;
int main(){
	cin >> n >> m;
	for(int i = 0;i < n;i++){
		for(int j = 0;j < m;j++){
			char g;
			cin >> g;
			a[i][j] = g - '0';
		}
	} 
	for(int i = 0;i < n;i++){
		for(int j = 0;j < m;j++){
			if(a[i + 1][j] != 0 and a[i-1][j] != 0 and a[i][j + 1] != 0 and a[i][j - 1] != 0){
				sum++;
			}
		}
	} 
	cout << sum;	
	return 0;
}