public class Main {
	public static void main(String[] args) {
		java.util.Scanner sc = new java.util.Scanner(System.in);
		int h = 0;
		int m = 0;
		int s = 0;

		s = sc.nextInt();

		h = s / 3600;
		s = s % 3600;
		m = s / 60;
		s = s % 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