from sys import stdin
def readLine_int_list():return list(map(int, stdin.readline().split()))
def readAll_int(): return list(map(int, stdin))


def main():
    memo = {}
    
    p1 = int(input())
    p2 = int(input())
    n = int(input())
    r = readAll_int()
    c = 0
    
    for i in r:
        if i in memo:
            c += 1
        memo[i] = 1
    print(c*(p1+p2))
    
    
if __name__ == "__main__":
    main()