UVA2037

#include<cstdio>
int Sum(int n)
{
    int sum=0;
    while(n!=0)
    {
        sum+=n%10;
        n/=10;

    }
    return sum;
}
void Cal(int a,int b)
{

    while(a!=b)
    {
        if(a<b)
        {

            a+=Sum(a);
        }
        else
        {
            b+=Sum(b);
        }

    }
    printf("%d\n",a);
}
int main()
{
    int n;
    int count=1;
    while(~scanf("%d",&n)&&n)
    {    if(count>1)
        printf("\n");
        printf("Case #%d\n",count++);
        int nn=Sum(n);
        if(nn%9==0)
        {

            printf("first meets river 9 at ");
            Cal(9,n);
        }
       else  if(nn%3==0)
        {

             printf("first meets river 3 at ");
            Cal(3,n);
        }
        else
        {

             printf("first meets river 1 at ");
            Cal(1,n);
        }

    }

}