#include "pch.h"

#include <string>

#include<iostream>

#include<map>

#include<memory.h>

#include<vector>

#include<algorithm>

#include<queue>

#include<vector>

#include<stack>

#include<math.h>

#include<iomanip>

namespace cc

{

    using std::cout;

    using std::endl;

    using std::cin;

    using std::map;

    using std::vector;

    using std::string;

    using std::sort;

    using std::priority_queue;

    using std::greater;

    using std::vector;

    using std::swap;

    using std::stack;

    constexpr double MD = 1e-;

    double p, q, r, s, t, u;

    double cal(double x)

    {

        return

            p * exp(-x) + q * sin(x) + r * cos(x) + s * tan(x)

            + t * x*x + u;

    }

    void solve()

    {

        while (cin >> p >> q >> r >> s >> t >> u)

        {

            double l = , r = ;

            if (cal(l)*cal(r) > )

            {

                cout << "No solution" << endl;

                continue;

            }

            while (r - l > MD)

            {

                double m = (l + r) / ;

                if (cal(m)*cal(l) > )

                    l = m;

                else

                    r = m;

            }

            cout << std::setiosflags(std::ios::fixed) << std::setprecision() << l << endl;;

        }

    }

};

int main()

{

#ifndef ONLINE_JUDGE

    freopen("d://1.text", "r", stdin);

#endif // !ONLINE_JUDGE

    cc::solve();

    return ;

}