#include <math.h>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
   int a, b, t, c, k;
    cin>>a>>b>>t;
        c = (0.5*a + 0.5*b);
    
   k = c % (1000000000+7);
    cout<<pow(k,t);
    return 0;
}