using System;

namespace yukicoder
{
    class Program
    {
        static void Main(string[] args)
        {
            int a = int.Parse(Console.ReadLine());
            int b = int.Parse(Console.ReadLine());
            int c = int.Parse(Console.ReadLine());
            string[] s1 = new string[c];
            int count = 0;
            int ans = a + b;
            string d = "";
            for(int i = 0; i < c; i++)
            {
                string s= Console.ReadLine();
                s1[i] = s;
            }
            for (int j = 0; j < c; j++)
            {
                for(int x = j+1; x < c; x++)
                {
                    if (s1[j] == s1[x])
                    {
                        if (j != 0)
                        {
                            if(s1[j] != s1[j - 1])
                            {
                                count++;
                            }
                        }else if (j == 0)
                        {
                            count++;
                        }
                        
                    }
                }
            }
            if (count >= 1)
            {
                ans *= count;
            }
            else
            {
                ans = 0;
            }
                Console.WriteLine(ans);
        }
    }
}