Union-find data structure is used extensively to solve problems associated with disjoint sets. Two sets are called disjoint sets if they don’t have any common elements. It supports the following op...

In the last couple of blogs, we’ve learned a couple of different types of attacks on web applications. In this blog, we will learn about DoS attacks i.e. Denial of Service attacks. DoS attacks come...

In this blog, we will explore another type of attack on web applications: injection type attack. SQL Injection is one of the most well-known attacks due to the use of databases with almost all the ...

Here in the blog post, we will learn about another type of attack, XML External Entity (XXE), which relies on an improperly configured XML parser on the application code. Even though the mitigation...

In the last blog post, we started exploring web application security, where we explored cross-site scripting attacks. Here in this blog post, we will learn about another different type of attack ca...

Security is a major aspect while developing any application, and web applications are more prone to attacks. Ideally, the security aspect of the application should be taken into consideration from ...

This wiki contains a couple of well-defined problems on Stack. Exam Progress (3544): Given a non-empty integer array nums representing the student’s scores for each test, return an equal-length a...

This wiki contains a couple of well-defined problems on Binary Tree. Part of the Binary Tree Problems series (2 parts) Binary Tree Algorithms - Part I Binary Tree Algorithms - Part II ← yo...

This wiki contains a couple of well-defined problems on Binary Tree. Part of the Binary Tree Problems series (2 parts) Binary Tree Algorithms - Part I ← you are here Binary Tree Algorithms...

This wiki contains a couple of example of SQL. #### SELECT LOWER(customer_name) AS lower_case_name, DATE_FORMAT(order_date, '%Y-%m-%d') AS formatted_date, TIMESTAMPDIFF(DAY, order_da...