import java.util.Scanner;

class Main {
 
	public static void main( String args[] ) {
		Scanner scan = new Scanner(System.in);
	    long x, jikan, hun, byou;
	    x = scan.nextLong();
	    jikan = x / 3600;
	    hun = (x - (jikan * 3600)) / 60;
	    byou = x - (jikan * 3600 + hun * 60);
	    
	    
	    System.out.println(jikan + ":" + hun + ":" + byou);
	    
	    //System.out.println(jikan);
	    //System.out.println(hun);
	    //System.out.println(byou);
    } 
 
}
/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