MODE = "stdio"
require 'matrix'

tmp = Array.new

class Integer
  def divisor_list2
    return [1] if self == 1
    (1..Math.sqrt(self).to_i).select do |i|
      self%i == 0
    end.map {|e| [e, self/e]}.flatten.uniq.sort
  end
end

if(defined? MODE)
  tmp = STDIN.read.split("\n")
else
  iotmp = "\
  46979
  ".split("\n")
  iotmp.each{|s|
    tmp << s.strip
  }
end


class Time
  def initialize(time)
    @time = time
  end
  def hour
    @time/3600
  end
  def min
    @time%3600/60
  end
  def sec
    @time%3600%60
  end
  def display
    print hour,":",min,":",sec,"\n"
  end
end




sec = tmp[0].to_i

tm = Time.new(sec)

tm.display