/*
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
*/
#include <iostream>
#include <cstring>
#include <algorithm>
#include <cstdio>
using namespace std;
double o[12] = {0.0, 0.0, 1.0, 1.7, 2.0, 2.3, 2.7, 3.0, 3.3, 3.7, 4.0, 4.3};
int l[12] = {0, 0, 60, 62, 65, 67, 70, 75, 80, 85, 90, 95};
int r[12] = {0, 59, 61, 64, 66, 69, 74, 79, 84, 89, 94, 100};
double f(int x){
    if( x >= 95 && x <= 100) return 4.3;
    if( x >= 90 && x <= 94) return 4.0;
    if( x >= 85 && x <= 89) return 3.7;
    if( x >= 80 && x <= 84) return 3.3;
    if( x >= 75 && x <= 79) return 4.0;
    if( x >= 70 && x <= 74) return 2.7;

    if( x >= 67 && x <= 69) return 2.3;
    if( x >= 65 && x <= 66) return 2.0;
    if( x >= 62 && x <= 64) return 1.7;
    if( x >= 60 && x <= 61) return 1.0;
    if( x >= 0 && x <= 59) return 0.0;
}

int S;
int main(){
    int T; cin >> T;
    for(int t = 1; t <= T; ++t){
        cin >> S;
        double sco = 0;
        for(int s1 = 1; s1 <= 11; ++s1){
            for(int s2 = 1; s2 <= 11; ++s2){
                for(int s3 = 1; s3 <= 11; ++s3){
                    for(int s4 = 1; s4 <= 11; ++ s4){
                        int L = l[s1] + l[s2] + l[s3] + l[s4];
                        int R = r[s1] + r[s2] + r[s3] + r[s4];
                        if(S >= L && S <= R) sco = max(sco, o[s1] + o[s2] + o[s3] + o[s4]);
                    }
                }
            }
        }
        printf("%.1lf\n", sco);
    }
    return 0;
}