1003

#include <stdio.h>


int main(void)
{
        float input, overhang = 0.0;
        int count = 2;

        while (1) {
                scanf("%4f",&input);
                if (input == 0.00)
                        break;
                if (input > 5.20 || input < 0.01)
                        return -1;

                count = 2;
                overhang = 0.0;
                while (1) {
                        overhang += (float)1 / (float)count;
                        count++;

                        if (overhang > input)
                                break;
                }

                printf("%d card(s)\n",count-2);
        }

        return 0;
}