Design Tag

2025

01-08

981. Time Based Key-Value Store

01-07

271. Encode and Decode Strings

2024

12-27

2013. Detect Squares

11-25

307. Range Sum Query - Mutable

07-16

173. Binary Search Tree Iterator

07-09

919. Complete Binary Tree Inserter

07-09

431. Encode N-ary Tree to Binary Tree

06-03

1261. Find Elements in a Contaminated Binary Tree

03-27

251. Flatten 2D Vector

01-03

284. Peeking Iterator

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