# include<bits/stdc++.h>
using namespace std;
int main(){
	int n, k = 0;
	int a[n + 5] = {0}, b[n + 5] = {0};
	cin >> n;
	for(int i = 1; i <= n; i++)
		cin >> a[i];
	for(int i = 1; i < n; i++){
		int w = a[i + 1] - a[i];
		if(w > 0) w *= -1;
		b[i] = w;
	}
	sort(b + 1, a + n);
	for(int i = 1; i < n; i++){
		if(b[i] == k) k++;
	}
	if(k == n) cout << "Jolly";
	else cout << "Not jolly";
	return 0;
} 

求指出错误