Telebot army is an absolute cinema
6 August 2025
It was the COVID era where everything was online, thus the rise of Telegram scammers trying to add random users to a particular set of scam and/or spam investment group chats. It was very...
Write-ups
I try to put some articles that might be useful for you. Stay tuned!
Why Python recursion sucks for competitive programming
1 July 2025
Having done several competitive programming (CP) problems in pure Python, it is safe to say that recursion is worse for most instances, especially for problems with tight memory or time limit....
Kattis of the Week
4 September 2024
Since I am no longer teaching CS2040 (Data Structures and Algorithms) as an undergraduate teaching assistant in NUS, I thought it would be nice to dump some additional Kattis problems here...
Fenwick Trees Made Easy!
28 July 2024
Let’s start with an array A of size N, each entry is initially zero. Suppose that over time, I want to support these operations on the array: We can do this naively with a single for loop, right?...
Pareto Fronts Made Easy!
22 July 2024
Suppose you have a set S of N different objects, each object having different scores for a particular set of metrics. Suppose we ask ourselves this question: How does one select as many objects as...
The Nine-point Circle
28 February 2024
Let us start off with a simple triangle △ABC. We draw the altitudes for each respective vertex, intersecting the corresponding sides at HA,HB,HC. It is a well-known fact that these three altitudes...
Uni Interview Prep
14 January 2024
The original article was written in 23 June 2020 and was written mainly based on my own opinion. I will mainly discuss about NUS and NTU scholarships interviews. Other universities’ may go the same...