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Master LeetCode algorithms by learning the invariant behind each pattern.

Invariant First publishes chaptered cinematic courses that start with the problem, clarify the constraints, explain the theory, and build the reusable pattern step by step.

Courses include Blind 75, Dynamic Programming, Binary Search, Matrix, Union Find, BFS, DFS, Greedy, Heaps, Prefix Sums, Strings, and graph algorithms.

Master the pattern. Preserve the invariant.