#include<bits/stdc++.h>
#define clr(x) memset(x,0,sizeof(x))
#define clrmax(x) memset(x,0x3f3f3f3f,sizeof(x))
#define clrmin(x) memset(x,-0x3f3f3f3f,sizeof(x))
#define pb push_back
#define LL long long
#define mod 1000000007
#define mp make_pair
using namespace std;
typedef pair<int,int> pii;
const int N = 1e2+10;
const int M = 1e6+10;
int T,n,m,k,s;
int score[] = {0,59,60,61,62,64,65,66,67,69,70,74,75,79,80,84,85,89,90,94,95,100};
double gpa[] = {0,0,1.0,1.0,1.7,1.7,2.0,2.0,2.3,2.3,2.7,2.7,3.0,3.0,3.3,3.3,3.7,3.7,4.0,4.0,4.3,4.3};
double ans;
void dfs(double now,int lf,int km){
    if(lf < 0) return ;
    if(km == 4){
        if(lf > 100) return ;
        now += gpa[lower_bound(score,score + 22,lf) - score];
        ans = max(ans,now);
        return ;
    }
    for(int i=0;i<22;i++){
        dfs(now + gpa[i],lf - score[i],km + 1);
    }
    return ;
}
int main(){
    scanf("%d",&T);
    while(T--){
        scanf("%d",&n);
        ans = 0;
        dfs(0,n,1);
        printf("%.1f\n",ans);
    }
    return 0;
}