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; 

}