#include<bits/stdc++.h>
using namespace std;

int a[11]={0,60,62,65,67,70,75,80,85,90,95};
int b[11]={0,10,17,20,23,27,30,33,37,40,43};

int t,n;

inline int rd()
{
    int x=0;char ch=getchar();
    for (;ch<'0'||ch>'9';ch=getchar());
    for (;ch>='0'&&ch<='9';ch=getchar()) x=x*10+ch-'0';
    return x;
}

inline void work()
{
    n=rd();
    int ans=0;
    for (int i=0;i<11;i++) for (int j=0;j<11;j++) for (int k=0;k<11;k++) for (int l=0;l<11;l++)
    {
        if (a[i]+a[j]+a[k]+a[l]<=n) ans=max(ans,b[i]+b[j]+b[k]+b[l]);
    }
    printf("%d.%d\n",ans/10,ans%10);
}

int main()
{
    t=rd();
    while (t--) work();
    return 0;
}