class Yukicoder
  def initialize
    n, m, c = gets.chomp.split.map(&:to_i)

    if [n,m].min == 1
      if [n,m].max == 2
        puts "YES"
      else
        puts "NO"
      end
    elsif (n*m).even?
      puts "YES"
    else
      puts "NO"
    end
  end
end

Yukicoder.new