YoungForest's blog

A biweekly review of reduction to zero, sliding windows, clock angles and same-value jump paths, plus competing from home while rusty.

A weekly review of doubled values, anagram frequencies, time buckets and exam seating, written after broken glasses disrupted the contest.

Weekly notes on weakest rows, halving an array by removals, maximum tree-split products and restricted descending jumps after a long break.

A short note on replacing an inelegant precompute-and-store iterator with a generator that yields combinations on demand in C++.

Two linear approaches to maximum and second-maximum pairs in subarrays: a monotonic stack and expansion from the highest differing XOR bit.

Biweekly notes on quarter-frequency elements, covered intervals, combination iteration and falling paths without reusing a column.

A practical guide to choosing, opening, and using bank accounts while living in Europe.

A six-in-the-morning contest, a day trip and a rushed assignment frame solutions for a changing citation index, diagonal flips and balanced arrangements.

Comparing a manual mount and a lightweight helper for writing to NTFS drives on macOS, with a practical choice for everyday use.

Weekly notes on collinear points, removing subfolders, balancing a four-symbol string and weighted job scheduling.