This is a Leet Code problem (1578 – Minimum Deletion Cost to Avoid Repeating Letters) solved in Java, the problem description is:
Given a string s and an array of integers cost where cost[i] is the cost of deleting the ith character in s.
Category: Java Advance Concepts
Difference between Synchronized & Volatile in Java
volatile keyword in Java is field modifier while synchronized modifies code blocks and methods. synchronized acquires and releases locks on entire code block or method
ArrayList vs. LinkedList
Arraylist is an index based Data Structure. While using Arraylist for searching or getting an element from an array with index is pretty fast. ArrayList