#include<iostream>
#include<algorithm>
#include<map>
#include<cstdio>
#define ll long long
#define lson (rt<< 1)
#define rson (rt<< 1 | 1)
#define gmid ((l+r)>> 1 )
using namespace std;

const int maxn=20000050;

double ans=0; 
int a[11]={0,60,62,65,67,70,75,80,85,90,95};
double s(int x)
{
    if(x<60) return 0;
    if(x<62) return 1;
    if(x<65) return 1.7;
    if(x<67) return 2.0;
    if(x<70) return 2.3;
    if(x<75) return 2.7;
    if(x<80) return 3.0;
    if(x<85) return 3.3;
    if(x<90) return 3.7;
    if(x<95) return 4.0;
    return 4.3;
}
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        int n,m,k;
        cin>>n;
        for(int i=0;i<=10;++i)
          {
                for(int j=0;j<=10;++j)
                  for(int k=0;k<=10;++k)
                    {
                          if(a[i]+a[j]+a[k]>n) continue; 
                          int z=n-a[i]-a[j]-a[k];
                          ans=max(ans,s(a[i])+s(a[j])+s(a[k])+s(z));
                    }
          }
        printf("%0.1f\n",ans);
        
    }
}