HDU2560 Buildings【水题】

Buildings

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)

Total Submission(s): 2725    Accepted Submission(s): 2304

Problem Description
We divide the HZNU Campus into N*M grids. As you can see from the picture below, the green grids represent the buidings. Given the size of the HZNU Campus, and the color of each grid, you should count how many green grids in the N*M grids.

Input
Standard input will contain multiple test cases. The first line of the input is a single integer T which is the number of test cases. T test cases follow. 
The first line of each test case contains two integers n and m(1<=n,m<=100), the size of the campus. Then follow n lines, each line containing m integers. The j-th integer in the i-th line is the color of that grid, 0 stands for white color, while 1 stands for green.

Output
Results should be directed to standard output. For each case, output an integers T, the total green grids in the N*M size campus.
 
Sample Input
2
2 2
1 1
0 0
3 3
1 0 1
0 0 1
1 1 0

Sample Output
2
5
 
Source

2008 HZNU Programming Contest

题目大意：给你一个N*M的矩阵，1代表绿色，0代表白色，问：总共有多少个绿色的单位。

思路：二重for循环，并统计1的个数，最后输出即可。

#include
#include
#include
#include
using namespace std;

int main()
{
    int T,N,M,d;
    cin >> T;
    while(T--)
    {
        cin >> N >> M;
        int sum = 0;
        for(int i = 0; i < N; ++i)
        {
            for(int j = 0; j < M; ++j)
            {
                cin >> d;
                if(d)
                    sum++;
            }
        }
        cout << sum << endl;
    }

    return 0;
}