package algo;

import java.util.ArrayList;
import java.util.Scanner;

import java.util.*;

public class sample7 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		List<Integer> list = new ArrayList<Integer>();
		
		for(int i=0; i < N; i++) {
			list.add(sc.nextInt());
		}
		System.out.println(list.get(N - 1) - list.get(0));
		
		int min = Math.abs(list.get(0) - list.get(1));
		for(int i=1; i < N - 1; i++) {
			min = Math.min(min, Math.abs(list.get(i) - list.get(i+1)));
		}
		System.out.println(min);
	}
}