mod = 10**9 + 7
def solve():
n, m, k = map(int, input().split())
if k == -1:
if n % 2 == 1 and m % 2 == 0:
print(0)
return
elif n % 2 == 0 and m % 2 == 1:
print(0)
return
x = (n - 1) * (m - 1)
print(pow(2, x, mod))
solve()
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