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

public class Solution {
    private int excludeIndex;
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int[] a = new int[n];
        for(int a_i=0; a_i < n; a_i++){
            a[a_i] = in.nextInt();
        }
        // your code goes here
        
        int smallest = findSmallest(a);
        int scndSmallest = findSecondSmallest(a,smallest);
        System.out.println (Math.abs(scndSmallest)-Math.abs(smallest));
    }
    
    public static int findSmallest(int[]a){
        int curSmallest=a[0];
        for (int i : a){
            if (curSmallest> Math.abs(i)){
                curSmallest=i;
            }   
        }
         //System.out.println (curSmallest);
        return curSmallest;
    }
    
    public static int findSecondSmallest(int[]a,int smallest){
        int curScndSmallest=a[0];
        for (int i : a){
            if (curScndSmallest>Math.abs(i) && Math.abs(i)!=smallest ){
                curScndSmallest=i;
            }   
        }
        //System.out.println (curScndSmallest);
        return curScndSmallest;
    }
    
}