#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
int main() {
	int n,x;
	cin >> n;
	vector<int> a(n),b(n*(n-1)/2);
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	x = 0;
	for (int i = 0; i < n-1; i++) {
		for (int j = i + 1; j < n; j++) {
			b[x] = a[j] - a[i];
			x++;
		}
	}
	sort(b.begin(), b.end());
	cout << b[0] << endl;
	cout << b[n*(n - 1) / 2-1] << endl;
}