x,y,n=gets.split.map{|e| e.to_i}

if x==1 || y==1
	if (x==1 && y==2) || (x==2 && y==1)
		puts "YES"
	else
		puts "NO"
	end
else
	if (x*y)%2==1
		puts "NO"
	else
		puts "YES"
	end
end