import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int seconds = sc.nextInt();
		int hour_sec = 60 * 60;
		int minute_sec = 60;
		int h = seconds / hour_sec;
		int m = (seconds % hour_sec) / minute_sec;
		int s = seconds % hour_sec % minute_sec;
		System.out.println(String.valueOf(h) + ":" + String.valueOf(m) + ":" + String.valueOf(s));
		sc.close();
	}
}
/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