2364. Count Number of Bad Pairs
Permutation: in order. n!/(n – m)! Combination: order not considered. n!/((n – m)! * m!) Key point of this problem is to transfer i…
Author: lcsqr
The Importance of ‘Chinese New Year’ Over ‘Lunar New Year’: Addressing Cultural Misrepresentation and Erasure
The terminology used to describe the celebration commonly known as “Chinese New Year” has become a topic of debate. Some advocate for the term…
DeepSeek’s AI Revolution: Embracing the Wisdom of the Snake in Post-Festival Innovation
As we transition from the festive celebrations of the Chinese New Year and return to our daily routines, it’s an opportune moment to reflect…
Which OpenAI Model Should You Use? Comparing GPT-4o, o1, and o3-mini
In the rapidly evolving landscape of artificial intelligence, OpenAI has consistently been at the forefront, developing models tailored to diverse user needs. Among their…
371. Sum of Two Integers
Given two integers a and b, return the sum of the two integers without using the operators + and -. Example 1: Input: a = 1, b = 2 Output: 3…
1462. Course Schedule IV
When someone told me to use Floyd Warshall Algorithm, I immediately knew what to do. But I still don’t get the intuit when to…
2657. Find the Prefix Common Array of Two Arrays
I hope every lc problems I encounter in the future will be as simple as this one. Single Pass with Frequency Array