#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <cstring>
#include <algorithm>
using namespace std;

double f[5][1000];

double v(int d)
{
    if (d>=95)
        return 4.3;
    else if (d>=90)
        return 4.0;
    else if (d>=85)
        return 3.7;
    else if (d>=80)
        return 3.3;
    else if (d>=75)
        return 3.0;
    else if (d>=70)
        return 2.7;
    else if (d>=67)
        return 2.3;
    else if (d>=65)
        return 2.0;
    else if (d>=62)
        return 1.7;
    else if (d>=60)
        return 1.0;
    return 0;
}

int main()
{
    int t,x,i,j,k;
    for (i=1;i<=100;i++)
        f[1][i]=v(i);
    for (i=2;i<=4;i++)
        for (j=1;j<=100;j++)
            for (k=0;k<=i*100;k++)
                if (k>=j)
                    f[i][k]=max(f[i][k],f[i-1][k-j]+v(j));
    scanf("%d",&t);
    while (t--)
    {
        scanf("%d",&x);
        printf("%.1f\n",f[4][x]);
    }
    return 0;
}