#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
int main()
{
    int X[11] = {95,90,85,80,75,70,67,65,62,60,0};
    double Y[11] = {4.3,4.0,3.7,3.3,3.0,2.7,2.3,2.0,1.7,1.0,0};
        int t;
    cin >> t;
    while(t--) 
    {
        int num;
        cin >> num;
        double large = 0;
        for(int i = 0; i < 11; i++)
                {
                    for(int j = 0; j < 11; j++)
                    {
                        for(int m = 0; m < 11;m++)
                        {
                            for(int n = 0; n < 11; n++)
                            {
                               
                                if(num >= X[i]+X[j]+X[m]+X[n]) large = max(large,Y[i]+Y[j]+Y[m]+Y[n]);
                            }
                        }
                    }
                }
        
        printf("%.1f\n",large);
    }
}