简单题

#include 
      
       using namespace std;int main(){    double    now, c;    int        i;    //freopen("t.txt", "r", stdin);    while (cin >> c && c != 0)    {        now = 0;        i = 2;        while (now < c)        {            now += 1.0 / i;            i++;        }        printf("%d card(s)\n", i - 2);    }    return 0;}