import java.util.Scanner;

class Main
{
	public static void main ( String[] args ) {
		Scanner sc = new Scanner ( System.in );

		int s = sc.nextInt ();

		int s1 = s % 60;
		int s2 = ( s / 60 ) % 60;
		int s3 = s / 60 / 60;
		
		System.out.println ( s3 + ":" + s2 + ":" + s1 );
	}
}
/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