#include <cstdio>

 #include <cmath>

 #define EPSILON 1e-9

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

 double f(double x)

 {

     return p*exp(-1.0*x) + q*sin(x) + r*cos(x) + s*tan(x) + t*x*x + u;

 }

 int main()

 {

 #ifdef LOCAL

     freopen("in", "r", stdin);

 #endif

     while (scanf("%d%d%d%d%d%d", &p, &q, &r, &s, &t, &u) != EOF)

     {

         if (f() <  || f() > )

         {

             printf("No solution\n");

             continue;

         }

         double x = , y = ;

         while (y - x > EPSILON)

         {

             double m = (x+y)/;

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

             else x = m;

         }

         printf("%.4lf\n", x);

     }

     return ;

 }