import java.util.Scanner;

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

		int S = 0; // ??\?????????????§?
		int h = 0; // ???
		int m = 0; // ???
		int s = 0; // ?§?

		S = sc.nextInt();

		h = S / 3600;
		m = ( S % 3600 ) / 60;
		s = ( S % 3600 ) % 60;

		System.out.println( h + ":" + m + ":" + s  );
	}
}
/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