#include <bits/stdc++.h>
using namespace std;
map<int,double> mp;
int t,n,score[]={0,60,62,65,67,70,75,80,85,90,95};
double res = 0;
void dfs(int cnt ,double ans,int num){
    if (cnt==4) res=max(res,ans);
    else {
        for (int i=0; i<11; i++)
            if (num >=score[i])
            dfs(cnt+1,ans+mp[score[i]],num-score[i]);
    }
}
int main (){
    //freopen("in.txt","r",stdin);
    scanf ("%d",&t);
    mp[0]=0,mp[60]=1.0,mp[62]=1.7,mp[65]=2.0,mp[67]=2.3;
    mp[70]=2.7,mp[75]=3.0,mp[80]=3.3,mp[85]=3.7,mp[90]=4.0;
    mp[95]=4.3;
    while(t--){
        scanf ("%d",&n);
        res = 0; 
        dfs(0,0.0,n);
        printf("%.1f\n",res);
    }
    return 0;
}