#include <bits/stdc++.h>
int main() {
  long long int a, b, s;
  scanf("%lld%lld%lld", &a, &b, &s);
  a = abs(a);
  b = abs(b);
  if ((s - a - b) < 0 || ((s - a - b) % 2 != 0))
    printf("NO");
  else
    printf("YES");
  return 0;
}
