#include<bits/stdc++.h>
using namespace std;
int T,x,i,j,k;
double f[401][5];
double get(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;
}
main()
{
    cin>>T;
    for(i=0;i<=400;i++)for(k=0;k<4;k++)for(j=0;i+j<=400;j++)f[i+j][k+1]=max(f[i+j][k+1],f[i][k]+get(j));
    while(T--)
    {
        cin>>x;
        printf("%.1f\n",f[x][4]);
    }
}