#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
int s[11]={0,60,62,65,67,70,75,80,85,90,95};
double c[11]={0.0,1.0,1.7,2.0,2.3,2.7,3.0,3.3,3.7,4.0,4.3};
int T,ss;
double ans;
int main(){

    scanf("%d",&T);
    for(int i=0;i<T;i++){
        scanf("%d",&ss);
        ans=0.0;
    for(int i=0;i<=10;i++){
        for(int j=0;j<=10;j++){
            for(int k=0;k<=10;k++){
                int sco=s[i]+s[j]+s[k];
                if(sco<=ss){
//                    printf("%d\n",ss-sco);
                    double cc=c[i]+c[j]+c[k]+c[upper_bound(s,s+11,ss-sco)-s-1];
                    if(cc>=ans){
                        ans=cc;
                    }
                }
            }
        }
    }
        printf("%.1lf\n",ans);
    }
    return 0;
}