Backtracking Topics

Master essential backtracking problems and patterns frequently asked in FAANG interviews.

•   01 Combination Sum Classic decision-tree backtracking to find all combinations
•   02 Sudoku Solver Constraint-based backtracking on a 2D grid
•   03 Permutations Generate all possible orderings of a set of elements
•   04 Subsets (Power Set) Generate all possible subsets from a given set
•   05 N-Queens Problem Advanced constraint-based backtracking problem

WONDERING, HOW DOES IT COVER PATTERNS?
These problems cover the most important backtracking patterns for interviews:

Combination Sum / Subsets → "Choose / Don't Choose" pattern for combination and subset problems.
Permutations → Swapping-based pattern for generating all orderings of a collection.
Sudoku Solver / N-Queens → Constraint propagation on a matrix, a common pattern in grid-based backtracking.

Together, they ensure you understand the core patterns for combinations, permutations, and constraint satisfaction in backtracking problems.