Microsoft

Primary = company-Microsoft-thirtydays.csv (~June 2025 LeetCode 30-day tag snapshot, 43 rows) sorted by Frequency descending; take all 41 non-Database problems (the 'top ~50' is moot since the snapshot is small); then append the 7 hxu296-microsoft-2022 top-15-by-occurrence classics the 30-day window missed (LRU Cache #1 at 52 occurrences, Number of Islands, Search in Rotated Sorted Array, Serialize and Deserialize Binary Tree, Reverse Words in a String, Sign of the Product of an Array, Find N Unique Integers Sum up to Zero) = 48 total (cap 60).