import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????
		int x;
		int sec,min,hour;
		Scanner sc = new Scanner(System.in);
		x = sc.nextInt();

		sec = x % 60;
		x = x / 60;
		min = x % 60;
		x = x / 60;
		hour = x;

		System.out.println(hour +":"+ min + ":"+ sec);
		sc.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