AlgoMaster 75 in Python with Tested Solutions

AlgoMaster 75 holds 75 problems (7 Easy, 53 Medium, 15 Hard). AlgoMaster 75 is this repository’s own curated 75, built for algorithmic mastery across the core interview patterns. Every problem generates a Python practice environment with a parametrized pytest suite and a tested reference solution. Generate the whole collection into the current directory:

lcpy gen -t algo-master-75

#	Problem	Difficulty	Solution
2	Add Two Numbers	Medium	solution.py
3	Longest Substring Without Repeating Characters	Medium	solution.py
4	Median of Two Sorted Arrays	Hard	solution.py
7	Reverse Integer	Medium	solution.py
11	Container With Most Water	Medium	solution.py
15	3Sum	Medium	solution.py
19	Remove Nth Node From End of List	Medium	solution.py
20	Valid Parentheses	Easy	solution.py
23	Merge k Sorted Lists	Hard	solution.py
24	Swap Nodes in Pairs	Medium	solution.py
25	Reverse Nodes in k-Group	Hard	solution.py
33	Search in Rotated Sorted Array	Medium	solution.py
34	Find First and Last Position of Element in Sorted Array	Medium	solution.py
41	First Missing Positive	Hard	solution.py
42	Trapping Rain Water	Hard	solution.py
45	Jump Game II	Medium	solution.py
46	Permutations	Medium	solution.py
48	Rotate Image	Medium	solution.py
49	Group Anagrams	Medium	solution.py
53	Maximum Subarray	Medium	solution.py
54	Spiral Matrix	Medium	solution.py
56	Merge Intervals	Medium	solution.py
64	Minimum Path Sum	Medium	solution.py
75	Sort Colors	Medium	solution.py
76	Minimum Window Substring	Hard	solution.py
78	Subsets	Medium	solution.py
84	Largest Rectangle in Histogram	Hard	solution.py
94	Binary Tree Inorder Traversal	Easy	solution.py
98	Validate Binary Search Tree	Medium	solution.py
102	Binary Tree Level Order Traversal	Medium	solution.py
124	Binary Tree Maximum Path Sum	Hard	solution.py
127	Word Ladder	Hard	solution.py
128	Longest Consecutive Sequence	Medium	solution.py
133	Clone Graph	Medium	solution.py
139	Word Break	Medium	solution.py
142	Linked List Cycle II	Medium	solution.py
144	Binary Tree Preorder Traversal	Easy	solution.py
145	Binary Tree Postorder Traversal	Easy	solution.py
146	LRU Cache	Medium	solution.py
149	Max Points on a Line	Hard	solution.py
151	Reverse Words in a String	Medium	solution.py
155	Min Stack	Medium	solution.py
169	Majority Element	Easy	solution.py
199	Binary Tree Right Side View	Medium	solution.py
200	Number of Islands	Medium	solution.py
208	Implement Trie (Prefix Tree)	Medium	solution.py
210	Course Schedule II	Medium	solution.py
212	Word Search II	Hard	solution.py
213	House Robber II	Medium	solution.py
230	Kth Smallest Element in a BST	Medium	solution.py
236	Lowest Common Ancestor of a Binary Tree	Medium	solution.py
238	Product of Array Except Self	Medium	solution.py
239	Sliding Window Maximum	Hard	solution.py
260	Single Number III	Medium	solution.py
295	Find Median from Data Stream	Hard	solution.py
297	Serialize and Deserialize Binary Tree	Hard	solution.py
300	Longest Increasing Subsequence	Medium	solution.py
322	Coin Change	Medium	solution.py
329	Longest Increasing Path in a Matrix	Hard	solution.py
338	Counting Bits	Easy	solution.py
347	Top K Frequent Elements	Medium	solution.py
392	Is Subsequence	Easy	solution.py
416	Partition Equal Subset Sum	Medium	solution.py
435	Non-overlapping Intervals	Medium	solution.py
437	Path Sum III	Medium	solution.py
438	Find All Anagrams in a String	Medium	solution.py
547	Number of Provinces	Medium	solution.py
560	Subarray Sum Equals K	Medium	solution.py
567	Permutation in String	Medium	solution.py
729	My Calendar I	Medium	solution.py
785	Is Graph Bipartite?	Medium	solution.py
787	Cheapest Flights Within K Stops	Medium	solution.py
994	Rotting Oranges	Medium	solution.py
1143	Longest Common Subsequence	Medium	solution.py
1584	Min Cost to Connect All Points	Medium	solution.py

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AlgoMaster 75 in Python with Tested Solutions