YoungForest's blog

A post-contest write-up on palindrome frequency checks, greedy ordering inside an energy-stone knapsack, and segment trees over gift events.

A day-out, night-finish review of domino normalisation, alternating paths, minimum-cost leaf trees and sign enumeration.

How to organize Markdown notes into a small GitBook project and generate formats for previewing and publishing.

A reflective note on turning 23 away from home, Beijing life, family warmth, study progress, interview lessons, and goals for the rest of 2019.

Weekly notes on relative sorting, deepest-leaf ancestry, longest well-performing intervals and the smallest sufficient team.

Post-exam notes on address replacement, difference-style flight bookings, deleting tree nodes and splitting nested parentheses.

Weekly notes on growing candy distributions, zigzag-tree paths, shelf packing and parsing boolean expressions.

Weekly notes on sample statistics, car-pool capacity, mountain-array searches and brace expansion after a comparator bug.

Exam-week notes on in-place zero duplication, label-limited selection, binary-grid paths and shortest common supersequences.

Weekly notes on a judging incident, adjacent-token state machines, tile permutations, recursive tree pruning and the smallest distinct subsequence.