#include <bits/stdc++.h>
using namespace std;

int get(int x) {
    if (x >= 95 && x <= 100) return 43;
    else if (90 <= x && x <= 94) return 40;
    else if (85 <= x && x <= 89) return 37;
    else if (80 <= x && x <= 84) return 33;
    else if (75 <= x && x <= 79) return 30;
    else if (70 <= x && x <= 74) return 27;
    else if (67 <= x && x <= 69) return 23;
    else if (65 <= x && x <= 66) return 20;
    else if (62 <= x && x <= 64) return 17;
    else if (60 <= x && x <= 61) return 10;
    else return 0;
}

int init(int x) {
    int res = 0;
    for (int i = 0; i <= 100; i++) {
        if (i > x) break;
        for (int j = 0; j <= 100; j++) {
            if (i + j > x) break;
            for (int k = 0; k <= 100; k++) {
                if (i + j + k > x) break;
                int l = x-(i+j+k);
                res = max(res, get(i)+get(j)+get(k)+get(l));
            }
        }
    }
    return res;
}

int res[405] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10,10,17,17,17,20,20,23,23,23,27,27,27,27,27,30,30,30,30,30,33,33,33,33,33,37,37,37,37,37,40,40,40,40,40,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,43,44,44,46,47,47,50,50,50,54,54,54,54,54,57,57,57,57,57,60,60,60,60,60,64,64,64,64,64,67,67,67,67,67,70,70,70,70,70,74,74,74,74,74,77,77,77,77,77,80,80,80,80,80,83,83,83,83,83,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,87,87,87,87,87,91,91,91,91,91,94,94,94,94,94,97,97,97,97,97,101,101,101,101,101,104,104,104,104,104,107,107,107,107,107,111,111,111,111,111,114,114,114,114,114,117,117,117,117,117,120,120,120,120,120,123,123,123,123,123,126,126,126,126,126,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,129,131,131,131,131,131,134,134,134,134,134,138,138,138,138,138,141,141,141,141,141,144,144,144,144,144,148,148,148,148,148,151,151,151,151,151,154,154,154,154,154,157,157,157,157,157,160,160,160,160,160,163,163,163,163,163,166,166,166,166,166,169,169,169,169,169,172,172,172,172,172,172,172,172,172,172,172,172,172,172,172,172,172,172,172,172,172};

int main() {
    
    int t;
    cin >> t;
    while (t--) {
        int x;
        scanf("%d", &x);
        printf("%.1f\n", 1.0*res[x]/10);
    }
}