10300 - Ecological Premium
Time limit: 3.000 seconds
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
学英语：
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.
首先你需要（计算出）每只动物所占的平均面积，用这一数值（单位：m^2）乘上农民的环境友好度，这一结果是这位农民需要付给他的每只动物的保险费（P）。要计算一位农民的最终的保险费，只需要将P乘上他所拥有的的动物数即可。
说了这么多，也就是面积x环境友好度。
完整代码：
/*0.009s*/
#include <cstdio>
int main(void)
{
int Case, Test, sum, x, y, z;
scanf("%d", &Case);
while (Case--)
{
sum = 0;
scanf("%d", &Test);
while (Test--)
{
scanf("%d%d%d", &x, &y, &z);
sum += x * z;
}
printf("%d\n", sum);
}
return 0;
}
