# frozen_string_literal: true

_, M = gets.chomp.split.map(&:to_i)
A = gets.chomp.split.map(&:to_i)

RESULT = A.slice_when { |i, j| i.even? != j.even? }
          .select { |i| i[0].odd? && i.size >= M }
          .map(&:sum)

puts RESULT