#include <windows.h>
#include <iostream>
#include <string>
#include <sstream>

using namespace std;

string tostr(double dZahl)
{
    string sOut;

    stringstream sstr;
    sstr << dZahl;
    sstr >> sOut;

    return sOut;
}

int main()
{
    double a, b, c;
    string A, B, C;

    while(true)
    {

    cout << "a = ";
    cin >> a;
    cout << "b = ";
    cin >> b;
    cout << "c = ";
    cin >> c;

    b = b/a;
    c = c/a;
    b=b/2;
    c = c-(b*b);
    c = a*c;
    b = b*(-1);

    cout << "S(" << tostr(b) << "|" << tostr(c) << ")\n" << endl;

    }
    return 0;
}