[Backend] Run flask in background with Gunicorn

[Leetcode] Minimum Height Trees

Use topology sort to find the node(s) residing at center area.

[Leetcode] Longest Repeating Character Replacement

[Leetcode] Design Add and Search Words Data Structure

A divergence of trie. While some solution uses Trienode, it may be too slow and a simple dictionary could work.

Description

[Leetcode] Next Permutation

Require a very special algo. In place modification makes it more difficult. A good practice for moving pointer…

[Leetcode Pattern] Stack / Queue

Stack is used to address LIFO problems while queue for FIFO problems. The concept of data structure is…

[Leetcode] Jump Game

Problems of greedy algorithm are usually intuitively challenging. For this one, the high level concept is “while already able to jump (global), stay behind the accessible point and seek greedier choice (local)”.

Description

[Leetcode] Decode String

Decode parentheses from string → stack. This one is more complicated as variables in and out need computation of just the right sequence.

Description

Given an encoded string, return its decoded string.

[Backend] Flask on GCP

Run a flask app on gcp, set the firewall rule, so the app shall be accessed.