How to Perform a Counting Using Array and Hash Table
A simple C++ solution to Leetcode 387. First Unique Character in a String.
Hash Table
How to Convert a Given Roman Numeral to its Equivalent Integer Value
A C++ solution to Leetcode 13. Roman to Integer using Hash table.
How To Find The Strings of a Given Pattern
A C++ solution to Leetcode 890. Find and Replace Pattern. It uses two unordered maps to establish and maintain the bijection while iterating through the characters of the words and the pattern.