# include <bits/stdc++.h>

typedef long long ll;

using namespace std;

int read() {
    int x = 0, f = 1;
    char ch = getchar();
    while (ch < '0' || ch > '9') {
        if (ch == '-')f = -1;
        ch = getchar();
    }
    while (ch >= '0' && ch <= '9') {
        x = x * 10 + ch - '0';
        ch = getchar();
    }
    return x * f;
}

double gpa[120];
int dd[11]={0,60,62,65,67,70,75,80,85,90,95};

int main()
{
    for(int i=0;i<=59;i++)gpa[i]=0;
    for(int i=60;i<=61;i++)gpa[i]=1.0;
    for(int i=62;i<=64;i++)gpa[i]=1.7;
    for(int i=65;i<=66;i++)gpa[i]=2;
    for(int i=67;i<=69;i++)gpa[i]=2.3;
    for(int i=70;i<=74;i++)gpa[i]=2.7;
    for(int i=75;i<=79;i++)gpa[i]=3.0;
    for(int i=80;i<=84;i++)gpa[i]=3.3;
    for(int i=85;i<=89;i++)gpa[i]=3.7;
    for(int i=90;i<=94;i++)gpa[i]=4.0;
    for(int i=95;i<=100;i++)gpa[i]=4.3;

    int T=read();
    while(T--)
    {
        int n=read();
        double ans=0;
        for(int i1=0;i1<11;i1++)
            if(dd[i1]<=n)
                for(int i2=0;i2<11;i2++)
                    if(dd[i1]+dd[i2]<=n)
                        for(int i3=0;i3<11;i3++)
                            if(dd[i1]+dd[i2]+dd[i3]<=n)
                                for(int i4=0;i4<11;i4++)
                                    if(dd[i1]+dd[i2]+dd[i3]+dd[i4]<=n)
                                        ans=max(ans,gpa[dd[i1]]+gpa[dd[i2]]+gpa[dd[i3]]+gpa[dd[i4]]);
        printf("%.1lf\n",ans);
    }
    return 0;
}