#include<bits/stdc++.h>
#define D(...) fprintf(stderr,__VA_ARGS__)
#define int long long
#define LL long long
#define MP make_pair
#define PB push_back
#define fi first
#define se second
#define ALL(x) (x).begin(),(x).end()
#define SZ(x) ((int)(x).size())
#define rep(i,a,b) for(int i=(a);i<=(b);++i)
#define per(i,a,b) for(int i=(a);i>=(b);--i)
using namespace std;
typedef pair<int,int>PII;typedef vector<int>VI;typedef vector<PII>VII;
template<typename T>void rd(T&x){int f=0,c;while(!isdigit(c=getchar()))f^=!(c^45);x=(c&15);while(isdigit(c=getchar()))x=x*10+(c&15);if(f)x=-x;}
template<typename T>void pt(T x,int c=-1){if(x<0)putchar('-'),x=-x;if(x>9)pt(x/10);putchar(x%10+48);if(c!=-1)putchar(c);}

int T,n;double f[5][505];
double getw(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;
}
void pre(){
    rep(i,1,4){
        rep(j,0,400){
            rep(k,0,j){
                f[i][j]=max(f[i][j],f[i-1][j-k]+getw(k));
            }
        }
    }
}
signed main(){
    pre();
    rd(T);
    while(T--){
        int x;rd(x);
        printf("%.1f\n",f[4][x]);
    }
    return 0;
}