A number chain is created by continuously adding the square of the digits in a number to form a new number until it has been seen before. For example, …
We have known the approach to merge two linked list in C++. We also know how to apply the merge sort algorithms to merge K sorted list. If you …
You have a queue of integers, you need to retrieve the first unique integer in the queue. Implement the FirstUnique class: FirstUnique(int nums) Initializes the object with the numbers …
If you want to design an SQL database from scratch, revamp an existing system, or collaborate with your software developers, you need professional SQL database experts for the job. …
Given a string s of zeros and ones, return the maximum score after splitting the string into two non-empty substrings (i.e. left substring and right substring). The score after …
HTML entity parser is the parser that takes HTML code as input and replace all the entities of the special characters by the characters itself. The special characters and …