> #include<stdio.h>
void main()
{
	int n=1;
	double len,x=0;
	scanf("%lf",&len);
	while(len)
	{
		x+=(1.0/(n+1));
		if(x>=len) break;
		else n++;
	}
	printf("%d",n);
	printf(" card(s)\n");
}