#include <bits/stdc++.h>
using namespace std;
inline double getfuck(int x) {
    if (x >= 95) return 4.3;
    else if (x >= 90) return 4.0;
    else if (x >= 85) return 3.7;
    else if (x >= 80) return 3.3;
    else if (x >= 75) return 3.0;
    else if (x >= 70) return 2.7;
    else if (x >= 67) return 2.3;
    else if (x >= 65) return 2.0;
    else if (x >= 62) return 1.7;
    else if (x >= 60) return 1.0;
    else return 0.0;
}
double f[401];
int main() {
    for (int i = 1; i <= 400; i++) f[i] = -1e18;
    f[0] = 0;
    for (int tc = 1; tc <= 4; tc++) {
        for (int i = 400; i >= 0; i--) {
            double res = -1e18;
            for (int x = 0; x <= min(i, 100); x++) {
                res = max(res, f[i - x] + getfuck(x));
            }
            f[i] = res;
        }
    }
    int T;
    scanf("%d", &T);
    while (T--) {
        int x;
        scanf("%d", &x);
        printf("%.1lf\n", f[x]);
    }
    return 0;
}