Đi làm

using System;
using System.Collections.Generic;

namespace di_lam_19_11_2019
{
    class Program
    {
        static void Main(string[] args)
        {
            int n,min,a;
            List<int> cong_ty =  new List<int>();
            n = Convert.ToInt32(Console.ReadLine());
            for(int i =0; i<n; i++ )
            {
                a = Convert.ToInt32(Console.ReadLine());
                cong_ty.Add(a);
            }
            cong_ty.Sort();
            min = cong_ty[1] - cong_ty[0];
            for(int i = n-1 ; i>1; i--)
            {
                a = cong_ty[i] - cong_ty[i-1];
                if (a <= min) min = a;
            }
            Console.WriteLine("--------------->{0}",min);
            Console.ReadKey();
        }
    }
}