题解 | 单组_二维数组

#include <stdio.h>

long long int arr[1000][1000] = { 0 };//放int main里面会导致栈溢出
int main() {
    long long int result = 0;
    long long int n, m;
    scanf("%lld %lld", &n, &m);

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            scanf("%lld", &arr[i][j]);
            result = result + arr[i][j];
        }
    }
    printf("%lld", result);
    return 0;
}