import java.util.Scanner;

public class Main85 {
	public static void main(String[] args) {
		Main85 p = new Main85();
	}

	public Main85() {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int c = sc.nextInt();
		
		if((n*m)%2==0 || n*m<=2)
			System.out.println("YES");
		else
			System.out.println("NO");
	}

	public void solve() {
	}

}