题解 | 单组_二维数组

#include <stdio.h>

int main()
{
    long long n = 0, m = 0, num = 0, sum = 0;
    scanf("%lld %lld",&n,&m);
    int i = 0, j = 0;
    for(i = 0; i < n; i++)
    {
        for(j = 0; j < m; j++)
        {
            scanf("%lld",&num);
            sum += num;
        }
    }
    printf("%lld",sum);
}