YoungForest's blog

A freezing first horseback ride on Bashang Grassland becomes a four-hour lesson in autumn beauty, physical soreness, unexpected cost and dry humour.

Looking back on four years of university: classes, competitions, friendships, change, and pivotal choices.

A candid account of a 2018 online internship interview: two algorithm and project rounds, an HR call, and a judgment about learning returns.

Practicing kth-largest selection before an interview: replacing an oversized memo table with repeated pivot partitioning.

A seven-day return to Shandong through Mount Tai, Qingdao and Jinan, using travel to process a low season and imagine future ways of living.

Transforming a search tree with cumulative sums, simplified from recursive value passing to reverse inorder and an explicit stack.

Finding the single number under linear-time and constant-space constraints through pairwise XOR cancellation.

A brief reflection on a difficult Face++ internship interview: a role mismatch, two minimum-value data-structure questions, and a vanished second round.

A hands-on Titanic tutorial covering problem framing, data exploration, preprocessing, feature engineering, model evaluation, and submission.

How recommendation systems in popular apps shape attention, preferences, and the information we consume.