import java.util.Scanner;
import java.util.concurrent.*;

public class Main{
	public static void main(String[] args){
		long s,sec,min,hour;
		Scanner in = new Scanner(System.in);
		
		s = in.nextLong();
		
		hour = TimeUnit.SECONDS.toHours(s);
		min = TimeUnit.SECONDS.toMinutes(s) - hour*60;
		sec = TimeUnit.SECONDS.toSeconds(s) - hour*3600 - min*60;
		
		System.out.println(hour+":"+min+":"+sec);
	}
}
/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