#include<iostream>
using namespace std;

int number(float f)
{
	int i=1;
	float s=0;
	while(s<=f)
	{
		i++;
		s+=1.0/i;
	}
	return i-1;
}

int main()
{
	int j=0,i=0;
	float a[100];
	while(1)
	{
		cin>>a[i];
		if(a[i]==0.00)
			break;
		i++;
	}
	for(j=0;j<i;j++)
		cout<<number(a[j])<<" (cards)"<<endl;
	return 0;
}