import java.util.Scanner;
/**
* Задача А. Сумма.
*/
public class Ex1 {
public static void main(String[] args) {
Scanner scr = new Scanner(System.in);
int A = scr.nextInt();
int B = scr.nextInt();
int n = scr.nextInt();
scr.close();
int x = A - B;
if (n > 0) {
if ((x % 2 == 0) && (x >= 2 * n)) {
System.out.println("YES");
} else {
System.out.println("NO");
}
} else if (n == 0) {
if (A == B) {
System.out.println("YES");
} else {
System.out.println("NO");
}
} else {
System.out.println("NO");
}
}
}