import java.util.Scanner;

class Main{
	public static void main(String[] args){
    	Scanner scan = new Scanner(System.in);
    	int x = scan.nextInt();
    	int h,m,s;
    	h = x / (60*60);
    	m = (x-h*60*60)/60;
    	s = x-h*60*60-m*60;
        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