import java.util.Scanner;

public class Main{
	public static void main(String[]args){
		Scanner scan = new Scanner(System.in);
		String S = scan.next();
		int time_sec = new Integer(S);
		
		int time_min = time_sec/60;
		int s =time_sec%60;
		
		int h =time_min/60;
		int m =time_min%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