#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) {
    printf("NO");
  } else {
    if (s == a + b) {
      printf("YES");
    } else {
      if ((s - (a + b)) % 2 == 0) {
        printf("YES");
      } else
        printf("NO");
    }
  }
  return 0;
}
