using System;

public class Program

{

    static int[] NhapMangNguyen()

        {

            Console.Write("Nhap so phan tu mang: ");

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

            int[] A = new int[n];

            while (n < 0)

            {

                Console.Write("\nNhap lai so phan tu mang: ");

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

            }

            for (int i = 0; i < n; i++)

            {

                Console.Write("\nPhan tu {0} = ", i);

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

            }

            return A;

        }

    static void XuatMangNguyen(int[] A)

        {

            Console.WriteLine("\nCac gia tri cua mang:");

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

                Console.Write("{0} ", A[i]);

        }

    static int Bai169(int[] A)

        {

            //Tim Max

            int Max = A[0];

            for (int i = 1; i < A.Length; i++)

                if (Max < A[i])

                    Max = A[i];

​

            //Tim so chan nho nhat lon hon tat ca cac so co trong mang

            if (Max % 2 == 0)

                return Max + 2;

            return Max + 1;            

        }

    public static void Main()

    {

        int[] A = NhapMangNguyen();

        XuatMangNguyen(A);

        Console.WriteLine("\nSo can tim: {0}",Bai169(A));

    }

}