int n,i=0,j,num[M];
    double Case[M],sum;
    scanf("%lf",&Case[i]);
    while(Case[i]!=0.00)
    {

        n=2;
        sum=0.00;
        while(sum<Case[i])
        {
            sum+=1.00/n;
            n++;
        }
    num[i]=n-2;
    i++;
    scanf("%lf",&Case[i]);
    }
    for(j=0;j<i;j++)
    printf("%d card(s)\n",num[j]);
    return 0;