include<stdio.h>

int main() {

double x,n,sum=0,i;
while(1)
{
	sum=0;
scanf("%lf",&x);
if(x==0)
{
	return 0;
}
else
{
	for(i=2;sum<x;i++)
    {
	sum=sum+1/i;
    }
    printf("%.0lf ",i-2);
    printf("card(s)");
    printf("\n");

}
}

}