hdu 1056(简单数学)

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/*
  Name: 简单数学 
  Copyright: 
  Author: Try86
  Date: 15/04/12 22:45
  Description: 
*/

#include <cstdio>
#include <iostream>

using namespace std;

int main() {
    double len;
    while (scanf("%lf", &len), len!=0.00) {
        double sum = 0;
        int i;
        for (i=2; sum<len; ++i) sum += 1.0/i;
        printf ("%d card(s)\n", i-2);
    }
    return 0; 
}