public class Main {
	public static void main(String[] args) {
		int inputSecond	= new java.util.Scanner(System.in).nextInt();
		
		int second	= inputSecond % 60;
		int minute	= inputSecond / 60;
		minute		= minute % 60;
		int hour	= inputSecond / (60*60);
		
		System.out.println( hour + ":" + minute + ":" + second );
	}
}
/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