import java.io.*;
class Main{
	public static void main(String[] args){
		try{
			BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
			String c = in.readLine();
			int time = Integer.parseInt(c);
			
			int h = time/3600;
			int m = (time%3600)/60;
			int s = time % 60;
			
			System.out.println(h+":"+m+":"+s);

		}catch(IOException e){
			e.printStackTrace();
		}

	}
}
/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