UVa 10491 - Cows and Cars Solution

#include <iostream>
#include <iomanip>
using namespace std;
int main(){
    ios::sync_with_stdio(0);
    double cow,car,show;
    while(cin>>cow>>car>>show){
        cout<<fixed<<setprecision(5)<<(car*(cow+car-1))/((cow+car)*(cow+car-show-1))<<endl;
    }
}