#include <iostream>
#include <algorithm>
#include <cmath>
#define ll long long

using namespace std;

const ll MOD = 1000000007;

ll magic(ll x,ll n){ // vraca x^n%MOD
	ll ret=1;
	while(n){
		if (n&1) ret=ret*x%MOD;
		x=x*x%MOD;
		n/=2;
	}
	return ret;
}

int main()
{
	ll a, b, t, sol;
	scanf("%lld%lld%lld", &a, &b, &t);
	
	sol = magic(((a+b)/2), t);
	printf("%lld\n", sol);
	
	return 0;
}