Solution UVA: 10678 - The Grazing Cow

 

Problem	Verdict	Lang	Time	Best	Rank	Submit Time
| discuss10678 - The Grazing Cow	Accepted	C++11	0.000	0.000	1136	19 secs ago

#include <bits/stdc++.h>

using namespace std;

double t, x, y, z, s;

double pi = 2*acos(0);

int main() {

    ios::sync_with_stdio(false);

    cin.tie(nullptr);

    cin >> t;

    while(t--){

        cin >> y >> z;

        y /= 2;

        z /= 2;

        x = sqrt(z*z - y*y); //pitago

        s = pi * x * z;

        cout<<fixed<<setprecision(3)<<s<<"\n";

    }  

}