#include<bits/stdc++.h>

using namespace std;
#define ll long long

int T, cnt, a[233], b[233];
int main() {
    a[++cnt]=95, b[cnt]=43;
    a[++cnt]=90, b[cnt]=40;
    a[++cnt]=85, b[cnt]=37;
    a[++cnt]=80, b[cnt]=33;
    a[++cnt]=75, b[cnt]=30;
    a[++cnt]=70, b[cnt]=27;
    a[++cnt]=67, b[cnt]=23;
    a[++cnt]=65, b[cnt]=20;
    a[++cnt]=62, b[cnt]=17;
    a[++cnt]=60, b[cnt]=10;
    a[++cnt]=0, b[cnt]=0;
    scanf("%d", &T);
    while(T--){
        int x, ans=0;
        scanf("%d", &x);
        for(int i1=1; i1<=cnt; ++i1)
            for(int i2=1; i2<=cnt; ++i2)
                for(int i3=1; i3<=cnt; ++i3)
                    for(int i4=1; i4<=cnt; ++i4)
                        if(a[i1]+a[i2]+a[i3]+a[i4]<=x)
                            ans=max(ans, b[i1]+b[i2]+b[i3]+b[i4]);
        printf("%d.%d\n", ans/10, ans%10);
    }
    return 0;
}