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10. Regular Expression Matching

Description

Given an input string sand a pattern p, implement regular expression matching with support for '.' and '*' where:

787. Cheapest Flights Within K Stops

Description

There are n cities connected by some number of flights. You are given an array flights where flights[i] = [from_i, to_i, price_i] indicates that there is a flight from city from_i to city to_i with cost price_i.

514. Freedom Trail

Description

In the video game Fallout 4, the quest “Road to Freedom” requires players to reach a metal dial called the “Freedom Trail Ring” and use the dial to spell a specific keyword to open the door.

The problem

Many times I cannot finish reading a doc, or taking too long to read a doc. And by the end of the day I don’t understand the doc and I need to read it again. Find a solution to this problem.

How to do better next time

U.S. stock market predicted by public account

12/18

Buy TSLA when drop to 414, buy dows

3251. Find the Count of Monotonic Pairs II

Description

You are given an array of positive integers nums of length n.

3250. Find the Count of Monotonic Pairs I

Description

You are given an array of positive integers nums of length n.

3249. Count the Number of Good Nodes

Description

There is an undirected tree with n nodes labeled from 0 to n - 1, and rooted at node 0. You are given a 2D integer array edges of length n - 1, where edges[i] = [a_i, b_i] indicates that there is an edge between nodes a_i and b_i in the tree.

3244. Shortest Distance After Road Addition Queries II

Description

You are given an integer n and a 2D integer array queries.

3243. Shortest Distance After Road Addition Queries I

Description

You are given an integer n and a 2D integer array queries.