import java.util.*;

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