#include <cstdio>

 #include <cmath>

 //using namespace std;

 const double e = 1e-;

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

 inline double f(double x)

 { return p*exp(-x) + q*sin(x) + r*cos(x) + s*tan(x) + t*x*x + u; }

 int main()

 {

     //freopen("in.txt", "r", stdin);

     while(scanf("%lf%lf%lf%lf%lf%lf", &p, &q, &r, &s, &t, &u) == )

     {

         if(f()<-e || f()>e) { puts("No solution"); continue; }

         double L = , R = , m;

         for(int i = ; i < ; i++)

         {

             m = (L+R)/;

             if(f(m) < ) R = m;

             else L = m;

         }

         printf("%.4f\n", m);

     }

     return ;

 }