import java.io.*;

class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br =
			new BufferedReader(new InputStreamReader(System.in));

			String line = br.readLine();
			int a = Integer.parseInt(line);

			int hour = a / 3600;
			int minute = (a - 3600 * hour) / 60;
			int s = a - 3600 * hour - 60 * minute;

			System.out.println(hour + ":" + minute + ":" + 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