import java.io.*;
public class Main {
	public static void main(String[] args) throws Exception{
		BufferedReader br = new BufferedReader(
				new InputStreamReader (System.in));
		String str=br.readLine();
		//String[] str = line.split(" ");
		int time=Integer.parseInt(str);
		int hour=time/3600;
		int min=(time-hour*3600)/60;
		int sec=time%60;
		System.out.println(hour+":"+min+":"+sec);
	}
}
/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