This repository tracks the coding challenges I have solved using data structures and algorithms in C++ and Python, with a focus on pattern recognition and reusable techniques.

Problem Types Covered

• Arrays and strings (two pointers, sliding window, prefix sums)
• Binary search (index search, answer-space search)
• Hashing and frequency-count problems
• Stack and queue challenges (including valid bracket sequences)
• Linked list operations (reversal, cycle checks, pointer tricks)
• Trees and binary trees (traversals, recursion, DFS/BFS)
• Graph problems (BFS/DFS, shortest path basics, connectivity)
• Recursion and backtracking (subsets, permutations, constraints)
• Dynamic programming (1D/2D DP, state transitions, optimization)
• Greedy strategy problems (local choice, interval-style decisions)
• Sorting and custom comparator based tasks
• Math/number theory basics (modulo, divisibility, counting)