import java.util.Scanner;

class Main {
    public void kami() {
        Scanner sc = new Scanner(System.in);
		int S = sc.nextInt();
			
			int h = S / 3600;
			int m = (S - h * 3600) / 60;
			int s = S - (h * 3600) - (m * 60);
			
			System.out.println( h + ":" + m + ":" + s);
		
    }
	public static void main(String[] args) {
        new Main().kami();

	}

}
/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