T041 矩阵最外圈减内心差

#include<stdio.h>

int main()
{
    int N, M, i, j, s1=0, s2=0;
    int a[100][100];
    scanf("%d%d", &N, &M);
    for(i=0;i<N;i++)
    {
        for(j=0;j<M;j++)
        scanf("%d", &a[i][j]);
    }
    for(i=0;i<N;i++)
    {
        for(j=0;j<M;j++)
        {
            if(i==0||i==N-1)
            s1+=a[i][j];
            else if(j==0||j==M-1)
            s1+=a[i][j];
            else s2+=a[i][j];
        }
    }
    printf("%d\n", s1-s2);
    return 0;
}

 

转载于:https://www.cnblogs.com/striderdu/p/4970674.html