#include<bits/stdc++.h>
using namespace std;
#define eps 1e-7
int p,q,r,s,t,u;

double solve(double x)
{
    return p*exp(-x)+q*sin(x)+r*cos(x)+s*tan(x)+t*x*x+u;
}
int main()
{
    double ans,lo,hi,mid;
    while(scanf("%d %d %d %d %d %d",&p,&q,&r,&s,&t,&u)!=EOF)
    {
        lo=0.0,hi=1.0;
        if(solve(lo)*solve(hi)>0)
            cout<<"No solution"<<endl;
        else
        {
            while(hi-lo>eps)
            {
                mid=(lo+hi)/2;
                if(solve(lo)*solve(mid)<=0)
                    hi=mid;
                else
                    lo=mid;
            }
            printf("%.4lf\n",lo);
        }
    }
    return 0;
}