import java.util.Scanner;

public class Main {
	private void calc(){
		Scanner scanner = new Scanner(System.in);
		int time =scanner.nextInt();
		
			int hour=time/3600;
			int min =(time-(3600*hour))/60;
			int sec =time-(3600*hour+60*min);
			System.out.print(hour +":"+ min + ":"+sec);
			System.out.println("");
	
	}
	
	public static void main(String[] args) {
		Main cubic =new Main();
		cubic.calc();

	}
}
/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