H,W,K= map(int,input().split())
A=[[0 for i in range(H)]for j in range(W)]
B=[[0 for i in range(H)]for j in range(W)]
s=0
f=0
p=set()
while f==0:
  # print(A)
  r=0
  for i in range(H):
    if r==1:
        break
    for j in range(W):
      q=tuple([A[(j+b)%W][(i+a)%H] for a in range(H) for b in range(W)])
      if q in p:
        r=1
        break
  t=set()
  for i in range(W):
    for j in range(H):
      t.add(A[i][j])
  if r==0 and len(t)==K:
    p.add(tuple([A[b][a] for a in range(H) for b in range(W)]))
  s+=1
  ptr=0
  while True:
    if ptr==H*W:
        f=1
        break
    if(A[ptr%W][ptr//W]==K-1):
      ptr+=1
    else:
      A[ptr%W][ptr//W]+=1
      while ptr>=1:
        ptr-=1
        A[ptr%W][ptr//W]=0
      break
print(len(p))