题解 | #矩阵计算#

#include <stdio.h>

int main()
{
	int n, m,i, j;
	int arr[20][20] = { 0 };
	int count=0;
	scanf("%d %d", &n, &m);
	for (i = 0; i < n; i++)
	{
		for (j = 0; j < m; j++)
		{
			scanf("%d", &arr[i][j]);
			if (arr[i][j] > 0)
				count = count + arr[i][j];
		}
	}
	printf("%d\n", count);
}