#include <bits/stdc++.h>
int main() {
  long long int a, b, c;
  scanf("%lld%lld%lld", &a, &b, &c);
  if (a < 0) a *= -1;
  if (b < 0) b *= -1;
  if (c < 0) c *= -1;
  if (a + b == c || (c - a + b) % 2 == 0 && a + b < c)
    printf("YES\n");
  else
    printf("NO\n");
  return 0;
}
