#include<bits/stdc++.h>
inline int read(){
    int x=0,w=1;
    char ch=0;
    while (ch<'0' || ch>'9'){
        ch=getchar();
        if (ch=='-') w=-1;    
    }
    while (ch<='9' && ch>='0'){
        x=(x<<1)+(x<<3)+ch-'0';
        ch=getchar();
    }
    return x*w;
}
using namespace std;
typedef long long ll;
const int N=1e5+5;
double dp[N];
inline double calc(int x){
    if (x>=95) return 4.3;
    if (x>=90) return 4.0;
    if (x>=85) return 3.7;
    if (x>=80) return 3.3;
    if (x>=75) return 3.0;
    if (x>=70) return 2.7;
    if (x>=67) return 2.3;
    if (x>=65) return 2.0;
    if (x>=62) return 1.7;
    if (x>=60) return 1.0;
    return 0;
}
int main(){
    for (int i=0;i<=100;++i)
        for (int j=i;j<=100;++j)
            for (int k=j;k<=100;++k)
                for (int t=k;t<=100;++t)
                    dp[i+j+k+t]=max(dp[i+j+k+t],calc(i)+calc(j)+calc(k)+calc(t));
    int T=read();
    while (T--){
        int x=read();
        printf("%.1lf\n",dp[x]);
    }
    return 0;
}