public static void main ( String args [ ] ) {
  FastReader input = new FastReader ( ) ;
  PrintWriter out = new PrintWriter ( System . out ) ;
  int T = 1 ;
  while ( T -- > 0 ) {
    long n = input . nextLong ( ) ;
    long m = input . nextLong ( ) ;
    int k = input . nextInt ( ) ;
    if ( ( n + m ) % 2 == 1 && k == - 1 ) {
      out . println ( 0 ) ;
    }
    else {
      long mod = 1000000007l ;
      long val = power ( 2l , m - 1 , mod ) ;
      val = power ( val , n - 1 , mod ) ;
      out . println ( val ) ;
    }
  }
  out . close ( ) ;
}

public static void main ( String args [ ] ) { FastReader input = new FastReader ( ) ; PrintWriter out = new PrintWriter ( System . out ) ; int T = 1 ; while ( T -- > 0 ) { long n = input . nextLong ( ) ; long m = input . nextLong ( ) ; int k = input . nextInt ( ) ; if ( ( n + m ) % 2 == 1 && k == - 1 ) { out . println ( 0 ) ; } else { long mod = 1000000007l ; long val = power ( 2l , m - 1 , mod ) ; val = power ( val , n - 1 , mod ) ; out . println ( val ) ; } } out . close ( ) ; }
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