Design in Python with Tests

Design holds 76 problems (13 Easy, 48 Medium, 15 Hard). Generate any of them into the current directory with lcpy gen -n <number>.

#	Problem	Difficulty	Solution
146	LRU Cache	Medium	solution.py
155	Min Stack	Medium	solution.py
170	Two Sum III - Data structure design	Easy	solution.py
173	Binary Search Tree Iterator	Medium	solution.py
208	Implement Trie (Prefix Tree)	Medium	solution.py
211	Design Add and Search Words Data Structure	Medium	solution.py
225	Implement Stack using Queues	Easy	solution.py
232	Implement Queue using Stacks	Easy	solution.py
244	Shortest Word Distance II	Medium	solution.py
251	Flatten 2D Vector	Medium	solution.py
271	Encode and Decode Strings	Medium	solution.py
281	Zigzag Iterator	Medium	solution.py
284	Peeking Iterator	Medium	solution.py
288	Unique Word Abbreviation	Medium	solution.py
295	Find Median from Data Stream	Hard	solution.py
297	Serialize and Deserialize Binary Tree	Hard	solution.py
303	Range Sum Query - Immutable	Easy	solution.py
304	Range Sum Query 2D - Immutable	Medium	solution.py
307	Range Sum Query - Mutable	Medium	solution.py
308	Range Sum Query 2D - Mutable	Medium	solution.py
341	Flatten Nested List Iterator	Medium	solution.py
346	Moving Average from Data Stream	Easy	solution.py
348	Design Tic-Tac-Toe	Medium	solution.py
352	Data Stream as Disjoint Intervals	Hard	solution.py
353	Design Snake Game	Medium	solution.py
355	Design Twitter	Medium	solution.py
359	Logger Rate Limiter	Easy	solution.py
362	Design Hit Counter	Medium	solution.py
379	Design Phone Directory	Medium	solution.py
380	Insert Delete GetRandom O(1)	Medium	solution.py
381	Insert Delete GetRandom O(1) - Duplicates allowed	Hard	solution.py
384	Shuffle an Array	Medium	solution.py
431	Encode N-ary Tree to Binary Tree	Hard	solution.py
432	All O`one Data Structure	Hard	solution.py
449	Serialize and Deserialize BST	Medium	solution.py
460	LFU Cache	Hard	solution.py
535	Encode and Decode TinyURL	Medium	solution.py
588	Design In-Memory File System	Hard	solution.py
604	Design Compressed String Iterator	Easy	solution.py
622	Design Circular Queue	Medium	solution.py
631	Design Excel Sum Formula	Hard	solution.py
635	Design Log Storage System	Medium	solution.py
641	Design Circular Deque	Medium	solution.py
642	Design Search Autocomplete System	Hard	solution.py
676	Implement Magic Dictionary	Medium	solution.py
677	Map Sum Pairs	Medium	solution.py
703	Kth Largest Element in a Stream	Easy	solution.py
705	Design HashSet	Easy	solution.py
706	Design HashMap	Easy	solution.py
707	Design Linked List	Medium	solution.py
715	Range Module	Hard	solution.py
716	Max Stack	Hard	solution.py
729	My Calendar I	Medium	solution.py
731	My Calendar II	Medium	solution.py
732	My Calendar III	Hard	solution.py
745	Prefix and Suffix Search	Hard	solution.py
855	Exam Room	Medium	solution.py
895	Maximum Frequency Stack	Hard	solution.py
900	RLE Iterator	Medium	solution.py
901	Online Stock Span	Medium	solution.py
911	Online Election	Medium	solution.py
919	Complete Binary Tree Inserter	Medium	solution.py
933	Number of Recent Calls	Easy	solution.py
981	Time Based Key-Value Store	Medium	solution.py
1166	Design File System	Medium	solution.py
1244	Design A Leaderboard	Medium	solution.py
1279	Traffic Light Controlled Intersection	Easy	solution.py
1396	Design Underground System	Medium	solution.py
1429	First Unique Number	Medium	solution.py
1472	Design Browser History	Medium	solution.py
1570	Dot Product of Two Sparse Vectors	Medium	solution.py
1603	Design Parking System	Easy	solution.py
1845	Seat Reservation Manager	Medium	solution.py
1993	Operations on Tree	Medium	solution.py
2013	Detect Squares	Medium	solution.py
2353	Design a Food Rating System	Medium	solution.py

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Design in Python with Tests