POJ 2575

#include<iostream>
#include<set>
#include<stdio.h>
using namespace std;

int my_abs(int);
int main()
{
    //freopen("acm.acm","r",stdin);
    int num;
    int i;
    int  * a;
    set<int> coll;
    while(cin>>num)
    {
        a = new int[num];
        for(i = 0; i < num; ++ i)
        {
            cin>>a[i];
        }
        for(i = 0; i < num - 1; ++ i)
        {
                coll.insert(my_abs(a[i] - a[i+1]));
        }        
        if((coll.size() == num - 1&&*coll.begin() == 1 && *coll.rbegin() == num - 1||num == 1))
            cout<<"Jolly"<<endl;
        else 
            cout<<"Not jolly"<<endl;
        coll.clear();
        delete[] a;
    }
}
int my_abs(int num)
{
    if(num >= 0)
        return num;
    else
        return num * (-1);

}