> #include"stdio.h"
> int main()
> {
> 	int number,i;
> 	while(scanf("%d",&number))
> 	{
> 		double length=0;
> 		printf("Cards  Overhang\n");
> 		for(i=1;i<=number;i++)
> 			length=length+1.0/(i*2);
> 		printf("%5d%10.3f\n",number,length);
> 	}
> 	return 0;
> }