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