WA for no reason?


import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner cin = new Scanner(System.in);
		float in = 0.0f;
		while ((in = cin.nextFloat()) != 0.0) {
			System.out.println(getCards(in) + " cards(s)");
		}
	}

	private static int getCards(float in) {
		float n = 0;
		while(in > 0){
			in -= 1/(++n + 1);
		}
		return (int) n;
	}
}