#include<bits/stdc++.h>
using namespace std;

const int maxn=405;
int T,n;
int val[maxn],dp[5][maxn];

int main(){
    for(int i=0;i<=100;i++){
        if(i<=59)val[i]=0;
        else if(i<=61)val[i]=10;
        else if(i<=64)val[i]=17;
        else if(i<=66)val[i]=20;
        else if(i<=69)val[i]=23;
        else if(i<=74)val[i]=27;
        else if(i<=79)val[i]=30;
        else if(i<=84)val[i]=33;
        else if(i<=89)val[i]=37;
        else if(i<=94)val[i]=40;
        else val[i]=43;
    }
    for(int i=0;i<=4;i++)for(int j=0;j<=400;j++)
        dp[i][j]=-1;
    dp[0][0]=0;
    for(int i=0;i<4;i++)for(int j=0;j<=i*100;j++)if(dp[i][j]>=0){
        for(int k=0;k<=100;k++)
            dp[i+1][j+k]=max(dp[i+1][j+k],dp[i][j]+val[k]);
    }
    scanf("%d",&T);
    while(T--){
        int n;
        scanf("%d",&n);
        printf("%.1lf\n",dp[4][n]/10.0);
    }
    return 0;
}