import java.io.*;

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

		String str = br.readLine();
		s = Integer.parseInt(str);

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