public class Main{
  public void run(java.io.InputStream in, java.io.PrintStream out){
    java.util.Scanner sc = new java.util.Scanner(in);
/*answer*/
    int s;
    s = sc.nextInt();
    System.out.println((s / 3600) + ":" + ((s % 3600) / 60) + ":" + (s % 60));
/*fin*/
    sc.close();
  }
  public static void main(String[] args){
    (new Main()).run(System.in, System.out);
  }
} public class Main{
  public void run(java.io.InputStream in, java.io.PrintStream out){
    java.util.Scanner sc = new java.util.Scanner(in);
/*answer*/
    int s;
    s = sc.nextInt();
    System.out.println((s / 3600) + ":" + ((s % 3600) / 60) + ":" + (s % 60));
/*fin*/
    sc.close();
  }
  public static void main(String[] args){
    (new Main()).run(System.in, System.out);
  }
} Main public void run(java.io.InputStream in, java.io.PrintStream out){
    java.util.Scanner sc = new java.util.Scanner(in);
/*answer*/
    int s;
    s = sc.nextInt();
    System.out.println((s / 3600) + ":" + ((s % 3600) / 60) + ":" + (s % 60));
/*fin*/
    sc.close();
  } run {
    java.util.Scanner sc = new java.util.Scanner(in);
/*answer*/
    int s;
    s = sc.nextInt();
    System.out.println((s / 3600) + ":" + ((s % 3600) / 60) + ":" + (s % 60));
/*fin*/
    sc.close();
  } java.util.Scanner sc = new java.util.Scanner(in); sc new java.util.Scanner(in) int s; s s = sc.nextInt() s sc.nextInt() sc.nextInt sc System.out.println((s / 3600) + ":" + ((s % 3600) / 60) + ":" + (s % 60)) System.out.println System.out System System.out (s / 3600) + ":" + ((s % 3600) / 60) + ":" + (s % 60) ":" ((s % 3600) / 60) (s / 3600) + ":" + ((s % 3600) / 60) + ":" + (s % 60) (s / 3600) s 3600 ":" ((s % 3600) / 60) (s % 3600) s 3600 60 ":" (s % 60) s 60 sc.close() sc.close sc java.io.InputStream in in java.io.PrintStream out out public static void main(String[] args){
    (new Main()).run(System.in, System.out);
  } main {
    (new Main()).run(System.in, System.out);
  } (new Main()).run(System.in, System.out) (new Main()).run (new Main()) System.in System System.in System.out System System.out String[] args args public class Main{
  public void run(java.io.InputStream in, java.io.PrintStream out){
    java.util.Scanner sc = new java.util.Scanner(in);
/*answer*/
    int s;
    s = sc.nextInt();
    System.out.println((s / 3600) + ":" + ((s % 3600) / 60) + ":" + (s % 60));
/*fin*/
    sc.close();
  }
  public static void main(String[] args){
    (new Main()).run(System.in, System.out);
  }
} public class Main{
  public void run(java.io.InputStream in, java.io.PrintStream out){
    java.util.Scanner sc = new java.util.Scanner(in);
/*answer*/
    int s;
    s = sc.nextInt();
    System.out.println((s / 3600) + ":" + ((s % 3600) / 60) + ":" + (s % 60));
/*fin*/
    sc.close();
  }
  public static void main(String[] args){
    (new Main()).run(System.in, System.out);
  }
} Main
public class Main{
  public void run(java.io.InputStream in, java.io.PrintStream out){
    java.util.Scanner sc = new java.util.Scanner(in);
/*answer*/
    int s;
    s = sc.nextInt();
    System.out.println((s / 3600) + ":" + ((s % 3600) / 60) + ":" + (s % 60));
/*fin*/
    sc.close();
  }
  public static void main(String[] args){
    (new Main()).run(System.in, System.out);
  }
}