#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, s;
  cin >> a >> b >> s;
  int sum;
  sum = abs(a) + abs(b);
  if (s >= sum && (s - sum) % 2 == 0) {
    cout << "YES";
  } else {
    cout << "NO";
  }
  return 0;
}
