#include<bits/stdc++.h>
using namespace std;
double f[5][505], now[105];
int main(){
    now[60]=1;
    now[62]=1.7;
    now[65]=2;
    now[67]=2.3;
    now[70]=2.7;
    now[75]=3.0;
    now[80]=3.3;
    now[85]=3.7;
    now[90]=4.0;
    now[95]=4.3;
    for (int i=61;i<=100;i++)
        if (now[i]<=0.1) now[i]=now[i-1];
    int T; scanf("%d",&T);
    for (int i=0;i<=4;i++)
        for (int k=0;k<=400;k++)
            f[i][k]=-1e9;
    f[0][0]=0;
    for (int i=1;i<=4;i++)
        for (int j=0;j<=100;j++)
            for (int k=i*100;k>=j;k--)
                f[i][k]=max(f[i][k],f[i-1][k-j]+now[j]);
    while (T--){
        int x; scanf("%d",&x);
        printf("%.1f\n",f[4][x]);
    }
}