import java.util.*;

class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);

		int S = in.nextInt();
		int h = S / 60 / 60;
		int m = (S / 60) % 60;
		int s = S % 60;

		System.out.println(String.format("%d:%d:%d", 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