program project1;

{$mode objfpc}{$H+}

uses
  {$IFDEF UNIX}{$IFDEF UseCThreads}
  cthreads,
  {$ENDIF}{$ENDIF}
  Classes
  { you can add units after this };
var t, tout:text;
  sim1,sim2,sim3,sim4,sim5:integer;

begin
  assign(t,'input.txt');
  reset(t);
  read(t,sim1);
  sim2:=sim1 mod 60;
  sim3:=sim1 div 60;
  sim4:=sim3 mod 60;
  sim5:=sim3 div 60;
  close(t);
  assign(tout,'output.txt');
  rewrite(tout);
  write(tout,sim5,':',sim4,':',sim2);
   close(tout);
end.