poj1003 java

import java.util.Scanner;
public class Main {
public static void main(String[] args){
Scanner cin = new Scanner(System.in);
while(cin.hasNext()){
double f = cin.nextFloat();
if(f == 0)
return;
if(f <=0.5){
System.out.println("1 card(s)");
continue;
}

int ans = 1;
double sum = 0.5;
int base = 2;
do{
base++;
ans++;
sum += 1.0/base;
}while(sum < f);
System.out.println(ans + " card(s)");
}

}

}