#include <iostream>

 #include <cstdio>

 #include <cmath>

 using namespace std;

 double y;

 double derivation(double x)

 {

     return *pow(x,)+*pow(x,)+*pow(x,)+*x;

 }

 double result(double x)

 {

     return *pow(x,)+*pow(x,)+*pow(x,)+*pow(x,)-y*x;

 }

 int main ()

 {

     int t;

     cin>>t;

     while (t--)

     {

         double x;

         cin>>y;

         double l=,r=;

         while (r-l>1e-)

         {

             x=(r+l)/;

             double yy=derivation(x);

             if (y>yy)

             l=x+1e-;

             else

             r=x-1e-;

         }

         x=(l+r)/;

         printf ("%.4lf\n",result(x));

     }

     return ;

 }