#include<stdio.h>

#include<math.h>

const double eps=1e-;

double js(double x,double y){

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

}

int main(){

    int n;

    double x,y,mmid,mid,l,r;

    while(~scanf("%d",&n)){

        while(n--){

            scanf("%lf",&y);

            l=,r=;

            while(r-l>eps){

                mid=(l+r)/;

                mmid=(mid+r)/;

                if(js(mid,y)<js(mmid,y))

                    r=mmid;

                else

                    l=mid;

            }

            printf("%.4f\n",js(mid,y));

        }

    }

    return ;

}