import java.util.*;

class Main
{
	public static void main(String args[]) {

		try {

			Scanner sc = new Scanner(System.in);

			int temp = Integer.parseInt(sc.next());

			int hou = temp/3600;
			int min = (temp/60) - (hou*60);
			int sec = temp - (hou*3600+min*60);

			System.out.println(hou +":"+ min +":"+ sec);
		}
		catch (Exception e) {
			System.out.println(e);
		}
	}
}
/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