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) {
        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 min1 = a[0];
        int min2 = a[0];
        int index1 = 0;
        for(int i = 0; i < n; i++){
            if(a[i] < min1 & a[i] >= 0){
                min1 = a[i];
                index1 = i;
            }
        }
        for(int i = 0; i < n; i++){
            if(a[i] < min1 & a[i] >= 0 & i != index1){
                min2 = a[i];
            }
        }
        int ans = Math.abs(min1 - min2);
        int ans2 = Math.abs(min2 - min1);
        if(ans < ans2){
            System.out.println(ans);
        }else{
            System.out.println(ans2);
        }
        
    }
}