n,m,c = gets.split.map(&:to_i)
if n == 1 || m == 1
    if n * m == 2
        puts "YES"
    else
        puts "NO"
    end
else
    if n % 2 == 1 && m % 2 == 1
        puts "NO"
    else
        puts "YES"
    end
end