YoungForest's blog

A weekly review of interval counting, stable length sorting, set containment and angular disk coverage, plus a reflection on ranking luck.

A biweekly review of equal-character windows, simplified fractions, ancestor-maximum tree DFS and target-cost knapsack DP as practice builds confidence.

A weekly review of stack operations, XOR triplets, return trips in an apple tree and pizza-cutting DP, alongside a milestone in sustained practice.

A weekly review of terminal cities, spacing scans, two-pointer range windows and a deduplicated priority queue for the kth matrix-row sum.

A review of eight backend internship recruiting processes, including rejections, cancellations, offers, ongoing interviews, and lessons learned.

A weekly review of split scores, cards taken from both ends, diagonal traversal and constrained-subset DP, plus the tradeoffs of a faster language.

A weekly review of alternating token types, restaurant-order aggregation, a frog state machine and exact-comparison array DP, with notes on state design.

Four solutions find local mountain peaks, schedule buses backward, decode nested robot paths and calculate how a wandering robot avoids a rectangular hole.

A biweekly review of positive prefix starts, greedy Fibonacci decomposition, happy-string backtracking and DP for restoring an array under a limit.

Three solutions simplify diamond-belt states, reorder sorted values from the middle outward, and use doubling power to repair a nondecreasing array.