#include <bits/stdc++.h>
using namespace std;
const long long MOD = 1e9 + 7;
long long powm(long long a, long long n) {
  long long base = 1;
  a %= MOD;
  while (n) {
    if (n & 1) base = base * a % MOD;
    a = a * a % MOD;
    n >>= 1;
  }
  return base;
}
int main() {
  long long a, b, t;
  cin >> a >> b >> t;
  if ((a & 1) != (b & 1) && t == -1) {
    cout << 0 << endl;
    return 0;
  }
  long long ans = powm(2, a - 1);
  ans = powm(ans, b - 1);
  cout << ans << endl;
}
