import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        try (Scanner in = new Scanner(System.in);) {
            int n = in.nextInt();
            Long[] a = new Long[n];
            for(int a_i=0; a_i < n; a_i++){
	            a[a_i] = in.nextLong();
	        }
            // sort the given array in ascending order on the absolute value of each element
            Arrays.sort(a, Comparator.comparingLong(Math::abs));
            
            // since the array is sorted, the absolute difference of first two elements is the result
            System.out.println(Math.abs(a[0] - a[1]));
		}
		catch (Exception e) {
			e.printStackTrace();
		}
    }
}