#include<bits/stdc++.h>
using namespace std;
const int a[10]={60,62,65,67,70,75,80,85,90,95};
const int b[10]={10,17,20,23,27,30,33,37,40,43};
int f[5][405];
int main()
{
    for (int i=1;i<=4;++i)
        for (int j=60;j<=400;++j)
            for (int k=0;k<=9;++k)
                if (a[k]<=j)
                    f[i][j]=max(f[i][j],f[i-1][j-a[k]]+b[k]);
    for (int i=1;i<=400;++i)
        f[4][i]=max(f[4][i],f[4][i-1]);
    int x,y;
    cin>>x;
    while (x--)
    {
        cin>>y;
        printf("%.1lf\n",(double)f[4][y]/10.0);
    }
}