POJ 2575

 1 #include<iostream>
 2 #include<set>
 3 #include<stdio.h>
 4 using namespace std;
 5 
 6 int my_abs(int);
 7 int main()
 8 {
 9     //freopen("acm.acm","r",stdin);
10     int num;
11     int i;
12     int  * a;
13     set<int> coll;
14     while(cin>>num)
15     {
16         a = new int[num];
17         for(i = 0; i < num; ++ i)
18         {
19             cin>>a[i];
20         }
21         for(i = 0; i < num - 1; ++ i)
22         {
23                 coll.insert(my_abs(a[i] - a[i+1]));
24         }        
25         if((coll.size() == num - 1&&*coll.begin() == 1 && *coll.rbegin() == num - 1||num == 1))
26             cout<<"Jolly"<<endl;
27         else 
28             cout<<"Not jolly"<<endl;
29         coll.clear();
30         delete[] a;
31     }
32 }
33 int my_abs(int num)
34 {
35     if(num >= 0)
36         return num;
37     else
38         return num * (-1);
39 
40 }