#include<bits/stdc++.h>
using namespace std;
const int b[15]={0,60,62,65,67,70,75,80,85,90,95};
const double c[15]={0,1.0,1.7,2.0,2.3,2.7,3.0,3.3,3.7,4.0,4.3};
int n;
double ans;
void dfs(int p,int x,double y){
    if(p>4){ans=max(ans,y);return;}
    for(int i=0;i<=10;++i)if(b[i]<=x)
        dfs(p+1,x-b[i],y+c[i]);
}
void solve(){
    scanf("%d",&n);ans=0;
    dfs(1,n,0);
    printf("%.1lf\n",ans);
}
int main(){
    int t;scanf("%d",&t);
    for(;t;--t)solve();
    return 0;
}