#include <iostream>
using namespace std;

int main()
{  
    float number,temp,avg=0.0;
    int n=1;
    cin>>number;
    if(number>0.01&&number<5.20)
       while(avg<number)
       {
		temp = ++n;        
		temp = 1/temp;  
		avg += temp;
       }
    cout<<n-1<<" "<<"card(s)";	
    return 0;
}