20250913

relaxed tiem with my wife
reviewed pull requests:
- LeetCode 104. Maximum Depth of Binary Tree
- LeetCode 15. 3Sum

20250912

full-time job (super hard)
- I feel drained. There are deadlines, communications, and so on.
printed out documents
spent some relaxed time with my wife

full-time job
- I tend to work too hard on Monday. I should try to keep my pace.
picture drawing
1 hour run, chest press

some work for my full-time position
1. Is Subsequence w/ Carolina
1. Search Insert Position w/ Carolina
- bisect.bisect_left(nums, target)
- getting familiar with Binary Search
checked undefined behavior in C++
- nasal demons
stretches, push-ups

some research on Python syntactic sugar
- Some people say a == b is syntactic sugar for a.__eq__(b), e.g., Ramalho of Fluent Python and Real Python - Syntactic Sugar: Why Python Is Sweet and Pythonic. Some people don’t.
spent some time with my wife, exploring new plazas, eating out @ Habit Burger
read “世の中の8割はどうでもいい。: 頑張ってもうまくいかない人生を変える思考術”
- The book was not very interesting, but it was good to read a book and exercise my brain cells.
stretches, push-ups

tire exchange @ JiffyLube
reviewed a pull request: LeetCode 50. Maximum Subarray
- different style of Kadane
full-time job
- I’ve been so busy. Is this how salespeople feel like every day?
picture drawing

LeetCode 133. Clone Graph
- refined my recursive solution by avoiding lambda nested functions
  - My mentor says that it is rare to use nested functions in C++
- updated my study note
full-time job
LeetCode 150. Evaluate Reverse Polish Notation
- I guess it is a famous notation in computer science. I think I studied the advantage of the polish notation, but I don’t exactly remember.
- TIL: std::to_string, std::stoi, switch () { only works for int, stack.top() / stack.pop() (unlike Python’s data structure, pop() does not return a value.).
made an appointment for tire exchange
stretches, push-ups

full-time job
60 minutes run (hard)
LeetCode 133. Clone Graph
- browsed the discussion on the computer hardware in the study group
- browsed clock cycles of 3rd Generation Intel® Xeon® Scalable Processor Family by downloading the CSV file.
  - one instruction requires 1~14 clock cycles :eyes:
  - Recent CPU has around 3 GHz frequency -> 3 * 10 ^ 9 clock cycles per second -> 3 clock cycles per 1 ns. Let’s say a program’s instructions cost 3 clock cycles on average -> 1 instruction per 1 nano second (with fast programming such as C++). However, Things are more complicated due to pipeline or concurrent instruction execution.
stretches, push-ups

some work for my full-time position
LeetCode 133. Clone Graph
- It is taking me some time to feel comfortable with C++ lambda syntax.
- created a pull request to ask for reviews in the study group

TODO: