UVa 10341

#include<bits/stdc++.h>
#include<cmath>
using namespace std;

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

float sol(float x)
{
    return p*exp(-x)+q*sin(x)+r*cos(x)+s*tan(x)+t*pow(x,2.0)+u;
}

int main()
{
    while(scanf("%lf %lf %lf %lf %lf %lf",&p,&q,&r,&s,&t,&u)!=EOF){
        double l=0,m=0.5,h=1,xm,xh;
        while(h-l>0.0000001){
            m=(l+h)/2;
            xm=sol(m);
            xh=sol(h);
            if((xh<0 && xm>0)||(xh>=0 && xm>xh)||(xh<=0 && xh>xm)){
                l=m;
            }
            else{
                h=m;
            }
        }
        if(abs(xm)<=0.0001)
            printf("%1.4f\n",m);
        else
            printf("No solution\n");
    }
    return 0;
}