UVa 10300 Ecological Premium (water ver.)

10300 - Ecological Premium
Time limit: 3.000 seconds
http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=94&page=show_problem&problem=1241
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 
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
英語を勉強する:
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.
まず、動物1匹あたりの平均面積を計算し、この数値(単位:m^2)で農民の環境友好度を乗じる必要があります.この結果、この農民は動物1匹あたりの保険料(P)を支払う必要があります.農民の最終的な保険料を計算するには、Pを持っている動物の数に乗せればいいだけです.
こんなにたくさん言ったのは、面積x環境の友好度です.
完全なコード:

/*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
", sum);
	}
	return 0;
}