#algo #ruby

kseq.rb

# Remove every subsequence of K elements with the same value.
# 1 1 1 2 3 3 4 5 
# 2
# Output: 1 2 4 5

sequence = $stdin.readline.chomp.split.map { |i| i.to_i }
k = $stdin.gets.chomp.to_i

last_digit = sequence[0]
count = 1
sequence[1..-1].each do |digit|
	if digit != last_digit
		(count % k).times { print "#{last_digit} " }

		last_digit = digit
		count = 1
	else
		count += 1
	end
end
(count % k).times { print "#{last_digit} " }
puts