#include<bits/stdc++.h>
  
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
#define sz(a) ((int)a.size())
#define pb push_back
#define lson (rt << 1)
#define rson (rt << 1 | 1)
#define gmid (l + r >> 1)
const int maxn = 2e5 + 5;
const int inf = 0x3f3f3f3f;
const int mod = 1e9 + 7;
 
inline double getGPA(int x){

    if(x < 0 || x > 100) return -1e5;
    else 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;
}

double ans[maxn];

int main(){
 
    ios::sync_with_stdio(0); cin.tie(0);
    for(int i = 0; i <= 100; ++i){

        for(int j = i; j <= 100; ++j){

            for(int k = j; k <= 100; ++k){

                for(int o = k; o <= 100; ++o){

                    int sum = i + j + k + o;
                    ans[sum] = max(ans[sum], getGPA(i) + getGPA(j) + getGPA(k) + getGPA(o));
                }
            }
        }
    }
    cout << fixed << setprecision(1);
    int t; cin >> t;
    while(t--){

        int n; cin >> n;
        cout << ans[n] << "\n";
    }
    return 0;
}