In this article, we will explore three medium-level coding problems and provide solutions for each of them. The problems we will discuss are:
- Minimum Number of Vertices to Reach All Nodes
- Maximum Twin Sum of a Linked List
- Swap Nodes in Pairs
While these problems may appear unrelated at first, they share common characteristics and can enhance our understanding of various programming concepts. Furthermore, by exploring their solutions, we can gain insights into graph theory, linked list manipulation, and algorithmic problem-solving techniques. Therefore, this article aims to provide readers with a comprehensive overview of these problems and their solutions.