#include <iostream>
using namespace std;
#define ll long long int 
#define MOD 1000000007
ll fast_exp(ll base, ll exp) {
    ll res=1;
    while(exp>0) {
       if(exp%2==1) res=(res*base)%MOD;
       base=(base*base)%MOD;
       exp/=2;
    }
    return res%MOD;
}
int main() { 
    // Use the min(a, b) as the second parameter
    // This prints: 27
    ll a,b,c;
    cin>>a>>b>>c;
    cout << fast_exp((a+b)/2, c) <<endl;
    return 0;
}