using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace yukicoderTest
{
    class Program
    {
        static void Main(string[] args)
        {
            int yuki = int.Parse(Console.ReadLine());
            int hurikae = int.Parse(Console.ReadLine());
            int yoyaku = int.Parse(Console.ReadLine());
            int[] room = new int[yoyaku];
            int kaburi = 0;
            int total = 0;
            for(int i=0;i<yoyaku;i++)
            {
                room[i] = int.Parse(Console.ReadLine());
            }
            Array.Sort(room);
            for(int i=0;i<room.Length-1;i++)
            {
                for(int j=i+1;j<room.Length;j++)
                {
                    if(room[i]==room[j])
                    {
                        kaburi++;
                        break;
                    }
                    
                }
            }
            total = (yuki + hurikae) * kaburi;
            Console.WriteLine(total);
        }
    }
}