Algorithms & Data Structures
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Backtracking
Explore every possibility, undo every mistake: the systematic way to search decision trees
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Learn backtracking, a controlled brute-force technique for exploring all valid configurations of a problem by building a solution incrementally and abandoning branches as soon as they violate a constraint. This subject covers the core recursive pattern and applies it to five classic interview problems: permutations, subsets, N-Queens, combination sums, and phone keypad letter combinations.