Mobile Casanova (UVA 12085, UVALive 2189, Regionals 2006 >> Asia - Dhaka)

///     Raihan Ruhin
///     CSE, Jahangirnagar University.
///     Dhaka-Bangladesh.
///     id: raihanruhin (topcoder / codeforces / codechef / uva / uvalive / spoj), 3235 (lightoj)
///     mail: raihanruhin@ (yahoo / gmail / facebook)
///     blog: ruhinraihan.blogspot.com

#include<bits/stdc++.h>
using namespace std;

#define SET(a) memset(a,-1,sizeof(a))
#define CLR(a) memset(a,0,sizeof(a))
#define PI acos(-1.0)

#define MOD 1000000007
#define MX 100000


int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    int tc, kk=1, n;
    long long arr[100000+2];
    string s;
    char ch;
    while(cin>>n && n)
    {
        for(int i=0;i<n;i++)
            cin>>arr[i];
        cout<<"Case "<<kk++<<":\n";
        for(int i=0;i<n;i++)
        {
            int st=i;
            while(i+1<n && arr[i+1]==arr[i]+1)
                i++;
            int ed=i;
            if(st==ed) cout<<"0"<<arr[i]<<"\n";
            else
            {
                cout<<"0"<<arr[st]<<"-";
                string s1 = "0"+to_string(arr[st]);
                string s2 = "0"+to_string(arr[ed]);
                int pos=0;
                while(s1[pos]==s2[pos])
                    pos++;
                for(int j=pos;j<s2.size();j++)
                    cout<<s2[j];
                cout<<"\n";
            }
        }
        cout<<"\n";
    }
return 0;
}