import java.util.Scanner;

public class Main{
   public static void main(String [] args){
      Scanner sc = new Scanner(System.in);
      int S = sc.nextInt();
      int h, m, s;
      h = S/3600;
      m = S%3600/60;
      s = S-((h*3600)+(m*60));
      System.out.println(h+":"+m+":"+s);
      sc.close();
   }
} import java.util.Scanner; Scanner java.util public class Main{
   public static void main(String [] args){
      Scanner sc = new Scanner(System.in);
      int S = sc.nextInt();
      int h, m, s;
      h = S/3600;
      m = S%3600/60;
      s = S-((h*3600)+(m*60));
      System.out.println(h+":"+m+":"+s);
      sc.close();
   }
} Main public static void main(String [] args){
      Scanner sc = new Scanner(System.in);
      int S = sc.nextInt();
      int h, m, s;
      h = S/3600;
      m = S%3600/60;
      s = S-((h*3600)+(m*60));
      System.out.println(h+":"+m+":"+s);
      sc.close();
   } main {
      Scanner sc = new Scanner(System.in);
      int S = sc.nextInt();
      int h, m, s;
      h = S/3600;
      m = S%3600/60;
      s = S-((h*3600)+(m*60));
      System.out.println(h+":"+m+":"+s);
      sc.close();
   } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int S = sc.nextInt(); S sc.nextInt() sc.nextInt sc int h h m m s; s h = S/3600 h S/3600 S 3600 m = S%3600/60 m S%3600/60 S%3600 S 3600 60 s = S-((h*3600)+(m*60)) s S-((h*3600)+(m*60)) S ((h*3600)+(m*60)) (h*3600) h 3600 (m*60) m 60 System.out.println(h+":"+m+":"+s) System.out.println System.out System System.out h+":"+m+":"+s ":" m h+":"+m+":"+s h ":" m ":" s sc.close() sc.close sc String [] args args public class Main{
   public static void main(String [] args){
      Scanner sc = new Scanner(System.in);
      int S = sc.nextInt();
      int h, m, s;
      h = S/3600;
      m = S%3600/60;
      s = S-((h*3600)+(m*60));
      System.out.println(h+":"+m+":"+s);
      sc.close();
   }
} public class Main{
   public static void main(String [] args){
      Scanner sc = new Scanner(System.in);
      int S = sc.nextInt();
      int h, m, s;
      h = S/3600;
      m = S%3600/60;
      s = S-((h*3600)+(m*60));
      System.out.println(h+":"+m+":"+s);
      sc.close();
   }
} Main
import java.util.Scanner;

public class Main{
   public static void main(String [] args){
      Scanner sc = new Scanner(System.in);
      int S = sc.nextInt();
      int h, m, s;
      h = S/3600;
      m = S%3600/60;
      s = S-((h*3600)+(m*60));
      System.out.println(h+":"+m+":"+s);
      sc.close();
   }
}
