KiẻmTra

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Text;
using System.Threading.Tasks;

namespace Cau1
{
    class Program
    {
        static void Main(string[] args)
        {
            int[,] a = input();
            //output(a);
            //Console.WriteLine(totalColumn(a, 2));
            //Console.WriteLine(totalMaxColumn(a));

            List<int> b = timHoanHao(a);
            foreach (int item in b)
            {
                Console.WriteLine(item);
            }
        }


        public static List<int> timHoanHao(int[,] a)
        {
            List<int> res = new List<int>();

            for (int i = 0; i < a.GetLength(0); i++)
            {
                for (int j = 0; j < a.GetLength(1); j++)
                {
                    if (kiemTraHoanHao(a[i, j])) res.Add(a[i, j]);
                }

            }
            return res;
        }

        public static bool kiemTraHoanHao(int a)
        {
            int total = 0;
            if (a == 0) return false;
            for (int i = 1; i < a; i++)
            {
                if (a % i == 0) total += i;
            }

            return total == a;
        }

        public static int totalMaxColumn(int[,] a)
        {
            int max = 0;
            int column = 0;
            for (int j = 0; j < a.GetLength(1); j++)
            {
                int temp = 0;
                for (int i = 0; i < a.GetLength(0); i++)
                {
                    temp += a[i, j];
                }
                if (max < temp)
                {
                    max = temp;
                    column = j;
                }
            }

            return column;
        }

        public static int totalColumn(int[, ] a, int k)
        {
            int total = 0;

            for (int i = 0; i < a.GetLength(0); i++)
            {
                for (int j = 0; j < a.GetLength(1); j++)
                {
                    if (j == k) total += a[i, j];
                }
            }

            return total;
        }

        public static int[,] input()
        {

            int m = 0, n = 0;
            do
            {
                m = int.Parse(Console.ReadLine());
            } while (m < 1 || m > 100);

            do
            {
                n = int.Parse(Console.ReadLine());
            } while (n < 1 || n > 100);

            int[,] a = new int[m, n];
            for (int i = 0; i < m; i++)
            {
                string[] temp = Console.ReadLine().Split();
                for (int j = 0; j < n; j++)
                {
                    a[i, j] = int.Parse(temp[j]);
                }
            }
            return a;
        }

        public static void output(int[,] a)
        {
            for (int i = 0; i < a.GetLength(0); i++)
            {
                for (int j = 0; j < a.GetLength(1); j++)
                {
                    Console.Write(a[i, j] + " ");
                }
                Console.WriteLine();
            }
        }

    }
}