#include<bits/stdc++.h>
#define LL long long
#define Max(a,b) ((a<b)&&(a=b))
#define Min(a,b) ((a>b)&&(a=b))
#define rep(i,a,b) for(int i=a,i##end=b;i<=i##end;++i)
#define drep(i,a,b) for(int i=a,i##end=b;i>=i##end;--i)
#define erep(i,a) for(int i=hd[a],y;(y=to[i]);i=nxt[i])
using namespace std;
char C;
inline int rd() {
    int res=0,f=1;
    while(C=getchar(),C<48||C>57)if(C=='-')f=0;
    do res=(res<<3)+(res<<1)+(C^48);
    while(C=getchar(),C>=48&&C<=57);
    if(f)return res;
    return -res;
}
double pt[202],dp[401];
void init(){
    rep(i,60,61)pt[i]=1.0;
    rep(i,62,64)pt[i]=1.7;
    rep(i,65,66)pt[i]=2.0;
    rep(i,67,69)pt[i]=2.3;
    rep(i,70,74)pt[i]=2.7;
    rep(i,75,79)pt[i]=3.0;
    rep(i,80,84)pt[i]=3.3;
    rep(i,85,89)pt[i]=3.7;
    rep(i,90,94)pt[i]=4.0;
    rep(i,95,100)pt[i]=4.3;
}
int main() {
    int T=rd();
    init();
    while(T--){
        int n=rd();
        rep(i,0,n)dp[i]=0;
        rep(k,1,4)drep(i,n,0)rep(j,0,100)
            if(i>=j)Max(dp[i],dp[i-j]+pt[j]);
        printf("%.1lf\n",dp[n]);
    }    
}