import java.util.Scanner;

public class QQ5 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int c = sc.nextInt();
		if(m == 1 && n == 1){
			System.out.println("YES");
		}
		if(n == 1 || m == 1 || (n % 2 != 0) && (m % 2 != 0)){
			System.out.println("NO");
		}else{
			System.out.println("YES");
		}
		sc.close();
	}
}