UVA 10300

http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=24&page=show_problem&problem=1241

这里是农夫耕地和农作物密度的问题，面积相乘再相加即可

#include<stdio.h>  
#include<stdlib.h>
int main()
{
 int n,f,i,a,sum,b,c;
 scanf("%d",&n);
   while(n--)
     {
      scanf("%d",&f);
      sum=0;
      while(f--)
         {
          scanf("%d%d%d",&a,&b,&c);
          sum+=a*c;
         }
      printf("%d\n",sum);
     }
   system("pause");
 return 0;
}