#include <iostream>
using namespace std;
int main()
{
while (true) {
double x;
cin >> x;
if (x == 0) break;
double sum = 0;
int cards = 0;
while (sum < x) {
cards++;
sum += 1.0/(cards + 1);
}
cout << cards << " " << "card(s)" << endl;
}
return 0;
}
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