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 = ; i < num; ++ i)
         {
             cin>>a[i];
         }
         for(i = ; i < num - ; ++ i)
         {
                 coll.insert(my_abs(a[i] - a[i+]));
         }
         if((coll.size() == num - &&*coll.begin() ==  && *coll.rbegin() == num - ||num == ))
             cout<<"Jolly"<<endl;
         else
             cout<<"Not jolly"<<endl;
         coll.clear();
         delete[] a;
     }
 }
 int my_abs(int num)
 {
     if(num >= )
         return num;
     else
         return num * (-);

 }