Explanation for Leetcode 705 - Design HashSet, and its solution in Python.

Explanation for Leetcode 169 - Majority Element, and its solution in Python.

Explanation for Leetcode 27 - Remove Element, and its solution in Python.

Explanation for Leetcode 14 - Longest Common Prefix, and its solution in Python.

Explanation for Leetcode 1929 - Concatenation of Array, and its solution in Python.

Explanation for Leetcode 746 - Min Cost Climbing Stairs problem, and its solution in Python.

Explanation for Leetcode 70 - Climbing Stairs problem, and its solution in Python.

Explanation for Leetcode 703 - Kth Largest Element in a Stream problem, and its solution in Python.

Explanation for Leetcode 1046 - Last Stone Weight problem, and its solution in Python.

Explanation for Merge Sort algorithm, its implementation in multiple programming languages, and its time complexity characteristics.