import java.util.Scanner;

public class Main{
	public static void main(String[] args){
		Scanner scan=new Scanner(System.in);
		
		int h,m,s;
		int S=scan.nextInt();
		h=S/3600;
		S=S%3600;
		m=S/60;
		s=S%60;
		System.out.printf("%d:%d:%d\n",h,m,s);
		
		
		scan.close();
	}
}
/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