import java.util.Scanner;


class Main { 
  public static void main(String[] args)

{
	Scanner stdIn=new Scanner(System.in);
	int S = stdIn.nextInt();
	int h,m,s;
	
	
	
	h=S/3600;
	int i=S-(3600*h);
	m=i/60;
	s=i-(60*m);
	
	
	System.out.println(h+":"+m+":"+s);
	
	
	
  }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz