10300 - Ecological Premium

Problem A

Ecological Premium

Input: standard input

Output: standard output

Time Limit: 1 second

Memory Limit: 32 MB

German farmers are given a premium depending on the conditions at their farmyard. Imagine the following simplified regulation: you know the size of each farmer's farmyard in square meters and the number of animals living at it. We won't make a difference between different animals, although this is far from reality. Moreover you have information about the degree the farmer uses environment-friendly equipment and practices, expressed in a single integer greater than zero. The amount of money a farmer receives can be calculated from these parameters as follows. First you need the space a single animal occupies at an average. This value (in square meters) is then multiplied by the parameter that stands for the farmer's environment-friendliness, resulting in the premium a farmer is paid per animal he owns. To compute the final premium of a farmer just multiply this premium per animal with the number of animals the farmer owns.

Input

The first line of input contains a single positive integer n (<20), the number of test cases. Each test case starts with a line containing a single integer f (0<f<20), the number of farmers in the test case. This line is followed by one line per farmer containing three positive integers each: the size of the farmyard in square meters, the number of animals he owns and the integer value that expresses the farmer’s environment-friendliness. Input is terminated by end of file. No integer in the input is greater than 100000 or less than 0.

 

Output

For each test case output one line containing a single integer that holds the summed burden for Germany's budget, which will always be a whole number. Do not output any blank lines.

 

Sample Input

3

5

1 1 1

2 2 2

3 3 3

2 3 4

8 9 2

3

9 1 8

6 12 1

8 1 1

3

10 30 40

9 8 5

100 1000 70

Sample Output

38

86

7445

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(The Joint Effort Contest, Problem setter: Frank Hutter)

 

注：每块土地的三个参数：x , y , z。

x代表这块土地所占空间;

y代表这块土地上的动物数;

z代表这块土地的经济效益;

根据题意：每只动物所需支付的金钱为：x/y*z;

即所有动物所需金钱为：x/y*z*y=x*z;

 

代码：

#include "stdio.h"

int main()
{
    long long sum,x,y,z;
    int n,f;
    scanf("%d",&n);
    while(n--)
    {
        sum=0;
        scanf("%d",&f);
        while(f--)
        {
            scanf("%lld %lld %lld",&x,&y,&z);
            sum=sum+x*z;
        }
        printf("%lld\n",sum);
    }
    return 0;
}