p1=int(input("p1"))
p2=int(input("p2"))
n=int(input("n"))

data=[]
for i in range(n):
    data.append(int(input(i)))

data.sort()
count=0
for i in range(n-1):
    if data[i]==data[i+1]:
        count+=1

print(str(count*(p1+p2)))