1 #include <cstdio>
 2 #include <cstring>
 3 #include <cmath>
 4 #include <iostream>
 5 #include <algorithm>
 6 #include <string>
 7 #include <cstdlib>
 8 
 9 using namespace std;
10 
11 int main()
12 {
13     int n;
14     printf("# Cards  Overhang\n");
15     while(~scanf("%d",&n))
16     {
17         double sum=0;
18         for(int j=1; j<=n; j++)
19             sum+=1.0/(2*j);
20         printf("%5d%10.3lf\n",n,sum);
21     }
22     return 0;
23 }