How to prepare
The AlgoPath blog has 28 articles in “How to prepare”, newest first, written for developers without a CS degree.
Kahn's algorithm in Python: topological sort, step by step
Kahn's algorithm sorts a directed graph by counting incoming edges. The code in Python, a trace you can follow by hand, the wording that tells you a problem wants it, and the three ways it breaks.
2026-09-24
Two pointers vs sliding window, and three more pairs people confuse
Two pointers and a sliding window both walk an array with two indices. What those indices mean separates them, and three more pairs work the same way.
2026-09-22
How to talk during a coding interview
The interviewer scores what you say, not what you think. Four things to say out loud, and how to rehearse them.
2026-09-15
Coding interview anxiety: practising under a timer
A timer is a diagnostic, not a difficulty setting. When to add one, and the script for the moment anxiety takes over.
2026-09-08
Spaced repetition: why review on day 4, not tomorrow
A review that comes too early costs time and buys nothing. Where the gap should sit, and what spaced repetition does to memory.
2026-09-01
Active recall: why it beats rereading
Rereading a solution is the weakest way to learn an algorithm. Active recall rebuilds it from an empty page, and that is the strongest.
2026-08-25
How to approach a coding problem, word by word
Read the problem twice before you write anything. One statement taken apart word by word, and what each phrase rules out.
2026-08-18
LeetCode patterns: the skill nobody trains
You can write binary search. Telling that a problem wants one is a separate skill, and almost nobody trains it.
2026-08-14
How to prepare for coding interviews properly
Fewer problems, each one used four times, with recognition trained on its own. What to do in the weeks before a coding interview.
2026-08-11