UVa 10038 - Jolly Jumpers

// UVa 10038 - Jolly Jumpers

#include <iostream>
#include <string.h>
#include <stdlib.h>
using namespace std;

int main() {
	int n;
	while (cin >> n) {
		int a, b;
		bool jolly = true;
		bool yet[3000];
		memset(yet, true, sizeof(yet));
		cin >> b;
		for (int i = 1; i < n; i++) {
			a = b;
			cin >> b;
			int c = abs(b - a);
			if (c < n && yet[c])
				yet[c] = false;
			else
				jolly = false;
		}
		cout << (jolly ? "Jolly" : "Not jolly") << endl;
	}
	return 0;
}