#include <bits/stdc++.h>
using namespace std;

int main()
{
    const int mod = 1000000007;
    int a, b, n;
    cin >> a >> b >> n;
    assert(a >= 0);
    assert(b >= 0);
    assert(n >= 0);
    assert(a < mod);
    assert(b < mod);
    assert(n < mod);
}