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

#define int long long
#define debug(x) cout<<#x<<" "<<x<<endl;

const int N=1e6+5;
const double eps=1e-9;
const int INF=1e18;

double f(int m)
{
    if(m>=95) return 4.3;
    if(m>=90) return 4.0;
    if(m>=85) return 3.7;
    if(m>=80) return 3.3;
    if(m>=75) return 3.0;
    if(m>=70) return 2.7;
    if(m>=67) return 2.3;
    if(m>=65) return 2.0;
    if(m>=62) return 1.7;
    if(m>=60) return 1.0;
    return 0;
}

double ans;

void dfs(int x,double sum,double fafa)
{
    if(sum<0) return ;
    if(x==4){
        ans=max(ans,fafa);
        return ;
    }
    dfs(x+1,sum-95,fafa+f(95));
    dfs(x+1,sum-90,fafa+f(90));
    dfs(x+1,sum-85,fafa+f(85));
    dfs(x+1,sum-80,fafa+f(80));
    dfs(x+1,sum-75,fafa+f(75));
    dfs(x+1,sum-70,fafa+f(70));
    dfs(x+1,sum-67,fafa+f(67));
    dfs(x+1,sum-65,fafa+f(65));
    dfs(x+1,sum-62,fafa+f(62));
    dfs(x+1,sum-60,fafa+f(60));
    dfs(x+1,sum,fafa);
}

signed main()
{
    //freopen("a.in","r",stdin);
    //freopen("a.out","w",stdout);
    int t;cin>>t;
    while(t--){
        int x;cin>>x;
        ans=-1;
        dfs(0,x,0);
        printf("%.1f\n",ans);
    }
    return 0;
}

//Created Time  :2020/7/19 14:00:44