1509

#include<bits/stdc++.h>

#define INF 1000010000
#define nl '\n'
#define pb push_back
#define ppb pop_back
#define mp make_pair
#define fi first
#define se second
#define pii pair<int,int>
#define pdd pair<double,double>
#define all(c) (c).begin(), (c).end()
#define SORT(c) sort(all(c))
#define rep(i,n) for( int i = 0; i < n; ++i )
#define repi(i,n) for( int i = 1 ; i <= n; ++i )
#define repn(i,n) for( int i = n - 1 ; i >= 0 ; --i )
#define repf(j,i,n) for( int j = i ; j < n ; ++j )
#define die(s) {std::cout << s << nl;}
#define dier(s) {std::cout << s; return 0;}
#define vi vector<int>
typedef long long ll;

using namespace std;


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.precision(4);
    cout.setf(ios::fixed);
    double a , b , c;
    int n = 0;
    while(cin >> a >> b >> c){
        if(a == -1.) return 0;
        cout << "Set " << ++n << ":" << nl;
        if (b*b <= a*c){
            die("Poor King!");
            continue;
        }
        double ans = a * c * (a + 2 * b + c) / (b * b - a * c);
        die(ans);
    }
    return 0;
}