import java.util.*;

public class Main {
	public static void main(String[] args){
		int S,h,m,s;
		Scanner sc = new Scanner(System.in);
		S = sc.nextInt();
		
		h = S / 3600;
		m = (S % 3600) / 60;
		s = (S % 3600) % 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