题解，不是你原创的题目请标注出处！

#include<bits/stdc++.h>
using namespace std;
int main(){
	int a ,b ,x;
	cin >> a >> b >> x;
	long long n[101][101] = {} ,n1[101][101] = {};
	for(int i=1;i<=a;i++){
		for(int j = 1 ; j <= b ; j++){
			cin >> n[i][j];
			n1[i][j] = n[i][j];
			if(n1[i][j] > 60)
				n1[i][j]-=x;
		}
	}
	for(int i = 2 ; i < a ; i++)
		for(int j = 2 ; j < b ; j++)
			n1[i][j] = (n[i][j] + n[i + 1][j] + n[i - 1][j] + n[i][j + 1] + n[i][j - 1]) / 5;
	for(int i = 1 ; i <= a ; i++){
		for(int j = 1 ; j <= b ; j++)
			cout << n1[i][j] << " ";
		cout << "\n";
    }
	return 0;
}