#include<bits/stdc++.h>
#define LL long long
#define dl double
template <class T>
void rd(T &x){
  x=0;T f=1;char ch=getchar();
  while(ch<'0' || ch>'9'){if(ch=='-')f=-1;ch=getchar();}
  while(ch<='9' && ch>='0')x=x*10+ch-'0',ch=getchar();x*=f;
}
using namespace std;

int T;
int x;

dl g(int a){
 if(a >= 95)return 4.3;
 if(a >= 90)return 4.0;
 if(a >= 85)return 3.7;
 if(a >= 80)return 3.3;
 if(a >= 75)return 3.0;
 if(a >= 70)return 2.7;
 if(a >= 67)return 2.3;
 if(a >= 65)return 2.0;
 if(a >= 62)return 1.7;
 if(a >= 60)return 1.0;
 return 0.0;
}

dl get(int a,int b,int c,int d){
 return g(a)+g(b)+g(c)+g(d);
}

int main(){
 // freopen("in.txt","r",stdin);
 // freopen("o.txt","w",stdout);
 rd(T);
 while(T--){
  rd(x);dl mx=0.0;
  for(int a=0;a<=min(x,100);a++){
   for(int b=0;b<=min(a,x-a);b++){
    for(int c=0;c<=min(b,x-a-b);c++){
     if(x-a-b-c > c)continue;
     mx=max(mx,get(a,b,c,x-a-b-c));
    }
   }
  }
  printf("%.1lf\n",mx);
 }
 return 0;
}
/**/