using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static long NN => long.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var p = NN;
        var q = NN;
        var n = NN;
        var set = new HashSet<long>();
        var ans = 0;
        for (var i = 0; i < n; ++i) if (!set.Add(NN)) ++ans;
        WriteLine(ans * (p + q));
    }
}