Ex1 Tink Back

using System;
using System.Collections.Generic;

namespace ConsoleApp1
{
    class Program
    {
        public static void Main(string[] args)
        {
            int n, k;
            var inputnk = Console.ReadLine();
            if (inputnk == null) return;
            n = Convert.ToInt32(inputnk.Split(" ")[0]);
            k = Convert.ToInt32(inputnk.Split(" ")[1]);
            var inputA = Console.ReadLine();
            if (inputA == null) return;
            HashSet<int> maxANumbers = new HashSet<int>(n);
            var maxA = 0;
            var masA = inputA.Split(" ");
            for (int i = 0; i < n; i++)
            {
                int a = Convert.ToInt32(masA[i]);
                if (a == maxA)
                {
                    maxANumbers.Add(i + 1);
                }

                if (a > maxA)
                {
                    maxANumbers.Clear();
                    maxA = a;
                    maxANumbers.Add(i + 1);
                }
            }

            var inputB = Console.ReadLine();
            if (inputB == null) return;
            var masB = inputB.Split(" ");
            for (int i = 0; i < k; i++)
            {
                int b = Convert.ToInt32(masB[i]);
                if (maxANumbers.Contains(b))
                {
                    maxANumbers.Remove(b);
                }
            }

            if (maxANumbers.Count > 0)
            {
                Console.WriteLine("Yes");
            }
            else
            {
                Console.WriteLine("No");
            }

        }
    }
}