gistfile1.hpp

#include <iostream>
#include <cmath>
#include <cstdio>
using namespace std;

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

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

int main()
{
	while(cin >> p >> q >> r >> s >> t >> u)
	{                 
		double rb = 1.0;
		double lb = 0.0;
		double mid = (rb + lb) / 2.0;

		if(f(lb) * f(rb) > 0)
			cout << "No solution\n";
		else
		{   
			int cnt = 0;

			while(cnt < 24)
			{   
				if(f(lb) * f(mid) > 0)
					lb = mid;
				else
					rb = mid;

				mid = (lb + rb) / 2.0;
				cnt++;
			}
			cout << mid+1e-8 << "\n";
		}
	}
	return 0;
}