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

int main() {
	int a, b, c;
	cin >> a >> b >> c;
	if ((a + b + c) % 2 == 0) {
		if (a + b >= c) {
			cout << "Yes";
		} else {
			cout << "No";
		}
	} else {
		cout << "Bad";
	}
	return 0;
}