#include "bits/stdc++.h"
using namespace std;
const int N = 105;
const int inf = 1e9+7;

int a[N] = {0,60,62,65,67,70,75,80,85,90,95};
double b[N] = {0,1.0,1.7,2.0,2.3,2.7,3.0,3.3,3.7,4.0,4.3};

int main()
{
    int t;  cin>>t;
    while(t--){
        int n;  cin>>n;
        double ans = 0;
        for(int i=0;i<=11;i++)
            for(int j=i;j<=11;j++)
        for(int k=j;k<=11;k++)
            for(int p=k;p<=11;p++){
            int sum = a[i] + a[j] + a[k] + a[p];
            if(sum>n) break;
            double ra = b[i] + b[j] + b[k] + b[p];
            ans = max( ra , ans );
        }
        printf("%.1f\n",ans);
    }
}