Coding Problems

Count unique paths from top-left to bottom-right of mxn grid

Count ways to decode numeric string to letters (A=1, B=2,...Z=26)

Maximum money from non-adjacent houses

Return all possible subsets of distinct integers

Generate all valid combinations of n pairs of parentheses

Check if word exists in 2D board (adjacent letters)

Find length of longest strictly increasing subsequence

Count distinct ways to climb n stairs (1 or 2 steps at a time)

Find contiguous subarray with largest sum (Kadane's Algorithm)

Check if array contains duplicate elements

Reverse a singly linked list

Implement pow(x, n) that calculates x raised to the power n

Design a URL shortening service that encodes and decodes URLs

Return an array where each element is the product of all elements except itself

Compute the fewest number of coins needed to make up an amount

Return a deep copy of a connected undirected graph

Find the total number of continuous subarrays whose sum equals to k

Find the kth smallest element in a binary search tree

Implement a queue using two stacks with push, pop, peek, and empty operations

Find maximum path sum in binary tree