#include <cstdio>

const int f[11] = {0, 60, 62, 65, 67, 70, 75, 80, 85, 90, 95};
const int g[11] = {0, 10, 17, 20, 23, 27, 30, 33, 37, 40, 43};

int main() {
    int Tests;
    scanf("%d", &Tests);
    while (Tests--) {
        int x, Ans = 0;
        scanf("%d", &x);
        for (int i1 = 0; i1 < 11; ++i1) {
            for (int i2 = 0; i2 < 11; ++i2) {
                for (int i3 = 0; i3 < 11; ++i3) {
                    int y = x - f[i1] - f[i2] - f[i3];
                    if (y < 0) continue;
                    int z = 0;
                    for (int j = 1; j < 11; ++j)
                        if (y >= f[j]) z = g[j];
                    z += g[i1] + g[i2] + g[i3];
                    Ans = Ans < z ? z : Ans;
                }
            }
        }
        printf("%.1lf\n", Ans / 10.);
    }
    return 0;
}