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