#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <ctime>
#include <cstdlib>
#include <queue>
#include <stack>
#include <vector>
#include <map>
#define maxn 110

using namespace std;

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

int main()
{
    int T; cin >> T;
    while (T -- )
    {
        int score;
        cin >> score;
        double res = 0;
        for (int i = 100; i >= 0; i -- )
            for (int j = i; j >= 0; j -- )
                for (int k = j; k >= 0; k -- )
                {
                    int all = i + j + k;
                    if (all > score) continue;
                    int l = score - all;
                    res = max(res, calc(i) + calc(j) + calc(k) + calc(l));
                }
        
        printf("%.1lf\n", res);
    }
    
    return 0;
}