Poj1003

package easy;


import java.util.Scanner;

/**
*poj1003
* easy
* @author NC
*/
public class Poj1003 {

public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
while (scan.hasNext()) {
float f = scan.nextFloat();
if (f == 0) {
break;
}
int i = 1;
float sum = 0f;
while (sum < f) {
sum = (float) (sum + 1.0 / (i + 1));
i++;
}
System.out.println((i - 1) + " card(s)");
}


}
}