import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Scanner;
import java.util.Set;
import java.util.TreeSet;

public class Main {
	
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		final int N = sc.nextInt();
		final int M = sc.nextInt();
		final int C = sc.nextInt();
		
		final int min = Math.min(N, M);
		final int max = Math.max(N, M);
		
		if(min == 1){
			if(max == 2){
				System.out.println("YES");
			}else{
				System.out.println("NO");
			}
		}else if(min % 2 != 0 && max % 2 != 0){
			System.out.println("NO");
		}else{
			System.out.println("YES");
		}
		
	}
	
}