import java.io.*;
class Main{
	public static void main(String args[]){
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

		try{
			String strS = in.readLine();
			int intS = (int)Integer.parseInt(strS);
			int h = intS / 3600;
			int m = (intS - h * 3600) / 60;
			int s = intS - (h * 3600 + m * 60);
			System.out.println(h + ":" + m + ":" + s);
		}catch(IOException e){
			System.out.println("error");
		}
	}
}
/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