题解 | #多组_二维数组_T组形式#

#include <stdio.h>

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