#include<iostream>
#include<algorithm>
#include<cmath>
#include<string>
#include<iomanip>
using namespace std;
int main() {
    int n;
    cin >> n;
    long long int a[1005];
    int ans = 0;
    for (int i = 0; i < n; i++) {
        cin >> a[i];//读入
    }
    int ans1 = 0;
    for (int i = 0; i < n-1; i++) {
        int jian = a[i] - a[i + 1];
        if (jian < 0) {
            jian = -jian;//正负
        }
        for (int j = 0; j < n; j++) {
            if (a[j] == jian) {
                ans++;//如果有则加一
                ans1 = ans1 + j;
            }
        }
    }
    if (ans == n - 1) {
        if (ans1 == n * (n - 1) / 2) {
            cout << "Jolly" << endl;
        }
    }
    else cout << "Not jolly" << endl;
    return 0;
}

先提前谢谢大佬