using System.Collections.Generic;
using System;
using System.Drawing;
namespace yukicoder
{
    class Program
    {

        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            var str = Console.ReadLine().Split(" ");
            int n = 0, ans = 0;
            
            List<int> list = new List<int>(N);
            
            for(int i = 0; i < N; i++)
            {
                list.Add(int.Parse(str[i]));
                
                if (list[n] == 0)
                {
                    list.RemoveAt(n);
                    n--;
                }
                n++;
            }

            list.Sort();

            if (list.Count < 2) 
            {
                Console.WriteLine("0");
            }
            

            int temp = list[list.Count - 1];
            for (int j = 0; j < list.Count  ; j++)
            {
                
                ans = list[j + 1] - list[j];
                if(ans < temp || j == list.Count - 2)
                {
                    if(j == list.Count - 2)
                    {
                        Console.WriteLine(temp);
                        break;
                    }
                    else if (ans == 0)
                    {
                        Console.WriteLine(list[j + 1] / list[j]);
                        break;
                    }
                    else
                    {
                        temp = ans;
                    }
                }
            }
        }
    }
}