a1 = int(input())
a2 = int(input())
N = int(input())
list = []
for i in range(N):
    n = input()    
    m = n.split()
    p = [int(i) for i in m]
    list.append(p)
a3 = 0
while list != []:
    c = list[0]
    list[0] = []
    newlist = [i1 for i1 in list if i1 != c]
    d = len(list) - len(newlist)
    a3 = a3 + d
else:
    a = (a1 + a2) * a3
    print(a)