/*******************************
*  Bismillahir Rahmanir Rahim
*  Harunur Rashid
********************************

************Template Starts Here***********/

#include<bits/stdc++.h>

using namespace std;

#define endl     "\n"
#define eps      1e-9
#define sf       scanf
#define xx       first
#define yy       second
#define pf       printf
#define ppb      pop_back
#define sqr(x)   ((x)*(x))
#define mp       make_pair
#define pb       push_back
#define pi       acos(-1.0)
#define mod      1000000007
#define pr(a)    cout<<a<<"\n"
#define sz(x)    ((int)x.size())
#define all(a)   a.begin(),a.end()
#define mem(a,b) memset(a,b,sizeof(a))
#define lcm(a,b) (abs(a)/gcd(a,b))*abs(b)

typedef long long int          lld;
typedef unsigned long long int llu;
typedef vector<int>            vi;
typedef pair<int,int>          pii;

template<class T>
T mod_f(T num)
{
    if(num>=0) return num%mod;
    else       return ((num%mod)+mod)%mod;
}

template<class T>
T fast_pow(T b,T p)
{
    if(p==0)
        return 1;
    if(p%2)
    {
        T x=mod_f(mod_f(b)*mod_f(fast_pow(b,p-1)));
        return x;
    }
    else
    {
        T x=mod_f(fast_pow(b,p/2));
        x=mod_f(mod_f(x)*mod_f(x));
        return x;
    }
}

template<class T>
T gcd(T a,T b)
{
    a=abs(a);
    b=abs(b);
    while(b)
    {
        T r=a%b;
        a=b;
        b=r;
    }
    return a;
}

/*/ 4 direction ....

int dx[]= {+0,+1,+0,-1};
int dy[]= {+1,+0,-1,+0};

// 8 direction ....

int dx[]= {+0,+1,+1,+1,+0,-1,-1,-1};
int dy[]= {+1,+1,+0,-1,-1,-1,+0,+1};

// Knight direction...

int dx[]= {+1,-1,+2,-2,+2,-2,+1,-1};
int dy[]= {+2,+2,+1,+1,-1,-1,-2,-2};
*/

/***********Template Ends Here***********/

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

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

int main()
{
    double low,mid,high;
    while(~scanf("%lf%lf%lf%lf%lf%lf",&p,&q,&r,&s,&t,&u))
    {
        low=0.0;
        high=1.0;
        for(int i=0;i<50;i++) /// getting WA using while(abs(low-high)>eps)
        {
            mid=(low+high)/2;
            if(equation(mid)<0) high=mid;
            else low=mid;
        }
        if(fabs(equation(mid))>eps) printf("No solution\n");
        else printf("%.4lf\n",mid);
    }
    return 0;
}