#include<iostream>
#include<string>
#include<vector>
#include<algorithm>

using namespace std;

int main() {
	
	int n;
	vector<int> a;
	bool flag=false;

	cin >> n;
	for (int i = 0;i < n;i++) {
		int buf;
		cin >> buf;
		a.push_back(buf);
	}

	for (int i = 0;i < a.size()-1;i++) {
		if (a[i] == a[i + 1])flag = true;
	}

	if (flag)cout << 0 << endl;
	else {
		int ans=1000000000;
		for (int i = 0;i < a.size()-1;i++) {
			int buf = abs(a[i+1]-a[i]);
			ans = min(ans,buf);
		}
		cout << ans << endl;
	}
	cout << abs(a[a.size() - 1] - a[0]) << endl;
	

	return 0;
}