Solve It

#include<bits/stdc++.h>
#define EPS 1e-7

using namespace std;

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

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

double bisection()
{
    double low=0,high=1,mid;

    while(low+EPS<high)
    {
        mid = (low+high)/2;

        if(func(low)*func(mid)<=0)
        {
            high = mid;
        }
        else
        {
            low = mid;
        }
    }

    return mid;
}

int main()
{
    while(scanf("%d%d%d%d%d%d",&p,&q,&r,&s,&t,&u)!=EOF)
    {
        double ans = func(0)*func(1);

        if(ans>0)
        {
            printf("No solution\n");
        }
        else
        {
            printf("%.4f\n",bisection());
        }
    }

    return 0;
}