import sys
input=lambda: sys.stdin.readline().rstrip()
p=0
for _ in range(2):
  p+=int(input())
n=int(input())
S=set()
ans=0
for _ in range(n):
  r=int(input())
  if r in S:
    ans+=1
  else:
    S.add(r)
print(p*ans)