#include <bits/stdc++.h>
#define mst(a,b) memset(a,b,sizeof(a))
#define lowbit(x) ((x)&(-x))
#define X first
#define Y second
#define lc o<<1
#define rc o<<1|1
using namespace std;
typedef long long LL;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef pair<double,double> pdd;
typedef pair<ll, ll> pll;
const int inf = 0x3f3f3f3f;
const ll INF = 0x3f3f3f3f3f3f3f3f;
const int maxn = 2000+10;
const int maxm = 100000+10;
const int mod = 1e9+7;
const double eps = 1e-8;
int a[20]={0,60,62,65,67,70,75,80,85,90,95};
double p[20]={0, 1.0, 1.7, 2.0, 2.3, 2.7, 3.0, 3.3, 3.7, 4.0, 4.3};
int main() {
#ifdef local
    freopen("in.txt", "r", stdin);
//    freopen("out.txt", "w", stdout);
#endif
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
/*
95~100 4.3
90~94 4.0
85~89 3.7
80~84 3.3
75~79 3.0
70~74 2.7
67~69 2.3
65~66 2.0
62~64 1.7
60~61 1.0
0~59 0
*/
    int T; cin>>T;
    while (T--){
        int n; cin>>n;
        double ans=0;
        for (int i=0;i<11;i++) for (int j=0;j<11;j++) for (int k=0;k<11;k++){
            int tmp=n-a[i]-a[j]-a[k];
            if (tmp<0) continue;
            double res=p[i]+p[j]+p[k];
            for (int l=10;l>=0;l--){
                if (tmp>=a[l]){
                    res+=p[l];
                    break;
                }
            }
            ans=max(ans,res);
        }
        cout<<setprecision(1)<<fixed<<ans<<"\n";
    }
    return 0;
}