Master Coding Interviews,
One Pattern at a Time

Pattern matching, palindromes, substrings

BST, DFS, BFS, traversals, tree construction

Two pointers, sliding window, binary search, sorting

Knapsack, LIS, LCS, coin change, grid DP

Number theory, geometry, combinatorics

Joins, aggregations, window functions

Reversal, merge, cycle detection, two pointers

Merge sort, quick sort, counting sort, custom

BFS, DFS, topological sort, shortest path

Grid traversal, rotation, spiral, search

Permutations, combinations, N-Queens, Sudoku

XOR tricks, bit masks, power of two

Interval scheduling, activity selection, optimal

LRU Cache, Iterator, data structure design

Monotonic stack, expression parsing, next greater

Prefix matching, autocomplete, word search

Priority queue, top-K, merge K sorted

Bash one-liners — word frequency, regex validation