E5-B cbj

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <ctype.h>
#include <time.h>
#pragma warning(disable:4996 6031)
int a[128][128] = { 0 };

int main(){
    int m, n, i, j, dx, dy;
    memset(a, -1, sizeof(a));
    scanf("%d%d", &m, &n);
    for(i = 1; i <= m; i++){
        for(j = 1; j <= n; j++){
            scanf("%d", &(a[i][j]));
        }
    }
    for(i = 1; i <= m; i++){
        for(j = 1; j <= n; j++){
            int cnt = 0;
            double sum = 0;
            for(dx = -1; dx <= 1; dx++){
                for(dy = -1; dy <= 1; dy++){
                    if(a[i + dx][j + dy] != -1){
                        sum += a[i + dx][j + dy];
                        cnt += 1;
                    }
                }
            }
            printf("%3d ", (int)round(sum / cnt));
        }
        putchar('\n');
    }
    return 0;
}