#include<bits/stdc++.h>
using namespace std;
#define ll long long
int main()
{
    ll t=1,x,a,b,c,d,e,f,i,j,k,l,m,n,o,sum;
    while(scanf("%lld",&x))
    {
        sum=0;
        if(x==0) return 0;
        for(i=0;i<x;i++)
        {
            scanf("%lld",&b);
            sum+=b;
        }
        printf("Case %lld:\n",t++);
        if(abs(sum)%x==0)
        {
            if(sum<0) printf("- ");
            printf("%lld\n",abs(sum)/x);
        }
        else
        {
            if(abs(sum)%x!=0 && abs(sum)/x>=1)
            {
                c=x;
                d=abs(sum);
                e=__gcd(c,d);
                c=c/e;
                d=d/e;
                if(sum<0)
                {
                    printf("   %lld\n",d%c);
                    printf("- %lld-\n",d/c);
                    printf("   %lld\n",c);
                }
                else if(sum>0)
                {
                    printf(" %lld\n",d%c);
                    printf("%lld-\n",d/c);
                    printf(" %lld\n",c);
                }
            }
            else
            {
                c=x;
                d=abs(sum);
                e=__gcd(c,d);
                c=c/e;
                d=d/e;
                if(sum<0)
                {
                    printf("  %lld\n",d);
                    printf("- -\n");
                    printf("  %lld\n",c);
                }
                else  if(sum>0)
                {
                    printf("%lld\n",d);
                    printf("%-\n");
                    printf("%lld\n",c);
                }
            }
        }
    }
    return 0;
}