Miscellaneous programs

1. Find the next greater number with same number of digits. Solution here

2. Simple class design: Constructor, Destructor, and Operator Overloading. It is a HackerRank Challenge.

3. Singly Linked List.

4. Binary Tree in C++. Python 3 implementation here.

5. Serialize Binary Tree

6. Hash Table.

7. Reverse an integer even if it's negative.

8. Predict the maximum profit to buy and sell a stock.

9. Find the periods where the profit of buying and selling stocks maximizes.

10. Reverse a string in-place

11. Find either one or two missing numbers in a list.

12. Find the k-missing numbers

13. A query to find the total monetary value of purchases ordered by categories. It requires the databases available at w3schools.com.

14. This query calculates the median value of geographic latitudes stored in a table available at HackerRank.

15. List hackers in a leader-board according to the total score of challenges: HackerRank.

16. A query to find the total quantity of products ordered. It requires the databases available at w3schools.com.

17. A query to find the number of orders per product category as given by the orders. It requires the databases available at w3schools.com.