import std.stdio, std.string, std.conv, std.algorithm, std.numeric;
import std.range, std.array, std.math, std.typecons, std.container, core.bitop;


void main() {
    int p1, p2;
    int n;

    scan(p1);
    scan(p2);
    scan(n);

    auto rs = new bool[](1000);
    int son;

    foreach (i ; 0 .. n) {
        int ri;
        scan(ri);

        if (rs[ri]) son += p1 + p2;

        rs[ri] = 1;
    }

    writeln(son);
}



void scan(T...)(ref T args) {
    string[] line = readln.split;
    foreach (ref arg; args) {
        arg = line.front.to!(typeof(arg));
        line.popFront();
    }
    assert(line.empty);
}



void fillAll(R, T)(ref R arr, T value) {
    static if (is(typeof(arr[] = value))) {
        arr[] = value;
    }
    else {
        foreach (ref e; arr) {
            fillAll(e, value);
        }
    }
}