Master essential algorithms and data structures for frontend interviews. Covers arrays, strings, trees, graphs, and dynamic programming. 2 problems per day with progressive difficulty.
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Foundation track to build momentum and core interview patterns.
Streak unlock checkpoint to maintain consistent daily practice.
Advanced track with higher complexity, edge cases, and interview depth.
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Start here: O(n) map/set patterns.
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Most common string window pattern.
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Calendar problems = interval mastery.
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Index correctness + invariants.
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Boundary conditions are the whole interview.
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Parens family = core parsing templates.
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The classic starter DP + greedy.
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Coin Change is the standard DP template.
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Top K is everywhere.
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Great real-world flavored problem.
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Course Schedule + BFS with state.
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Traversal templates.
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Autocomplete/search DS + constraints satisfaction.
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Pick 2 based on time.