#include <bits/stdc++.h>

using namespace std;

namespace jumpmelon
{
    struct range
    {
        int l, r;
        double s;
    };

    const int MAXX = 400;
    double F[MAXX + 1];
    vector<range> V = {{95, 100, 4.3},
        {90, 94, 4.0},
        {85, 89, 3.7},
        {80, 84, 3.3},
        {75, 79, 3.0},
        {70, 74, 2.7},
        {67, 69, 2.3},
        {65, 66, 2.0},
        {62, 64, 1.7},
        {60, 61, 1.0},
        {0, 59, 0.0}};

    void work()
    {
        for (int i = 1; i <= MAXX; i++)
            F[i] = -INFINITY;
        for (int q = 0; q < 4; q++)
            for (int i = 0; i <= MAXX; i++)
                for (auto &&r : V)
                    for (int j = r.r; j >= r.l; j--)
                        if (i >= j)
                            F[i] = max(F[i], F[i - j] + r.s);
        int kase;
        scanf("%d", &kase);
        while (kase--)
        {
            int x;
            scanf("%d", &x);
            printf("%.1f\n", F[x]);
        }
    }
}

int main()
{
    jumpmelon::work();
    return 0;
}