 
class Main{
	public static void main(String[] args) {
		int InputSecond = new java.util.Scanner(System.in).nextInt();
		int hours;
		int minutes;
		int seconds;
		
		hours = InputSecond / 3600;
		minutes = (InputSecond % 3600) / 60;
		seconds = InputSecond % 60;
		System.out.println(hours + ":" + minutes + ":" + seconds);
	}
}
/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