using System;

public class Program

{

    static int[] Nhapmang()

        {

            int[] A;

            Console.WriteLine("Nhap so phan tu:");

            int N = int.Parse(Console.ReadLine());

            A = new int[N];

            for (int x = 0; x < A.Length; x++)

            {

                Console.WriteLine($"Nhap A[{x}]");

                A[x] = int.Parse(Console.ReadLine());

            }

            return A;

        }

        static int Timamcuoicung(int[] A)

        {

            int y = 0;

            for (int x = 0; x < A.Length; x++)

            {

                if (A[x] < 0)

                {

                    y = A[x];

                }

            }

            return y;

        }

        static void Main(string[] args)

        {

            int[] A = Nhapmang();

            int kq = Timamcuoicung(A);

            Console.WriteLine($"Trung binh cac so nguyen to trong mang la {kq}");

            Console.ReadLine();

        }

}