import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigDecimal;
import java.math.BigInteger;

public class Sol {

    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String[] s = reader.readLine().split(" ");
        int x = Integer.parseInt(s[0]) + Integer.parseInt(s[1]);
        long t = Long.parseLong(s[2]);
        BigInteger z = new BigInteger("" + x);
        z = z.divide(new BigInteger("2"));
        z = z.modPow(new BigInteger("" + t), new BigInteger("1000000007"));
        System.out.println(z);
        reader.close();
    }

}