UVA 10678 - The Grazing Cow
Problem PDF
Solution:
#include
#include
#include
#include
#include
#include
#include
#include
#define pi 2*acos(0.0)
using namespace std;
int main()
{
unsigned long long i;
cin>>t;
while(t--){
double x,y;
cin>>x>>y;
double t;
t=sqrt((y/2)*(y/2)-(x/2)*(x/2));
printf("%.3lf\n",pi*y/2*t);
}
return 0;
}