Problem Statement (Asked By Stripe) You are given an array of integers. Your task is to find the smallest missing…
Given the root of a binary tree, create two functions: serialize(root) - Converts the binary tree into a string representation.…
Problem Statement (Asked By Uber) Given a list of integers, return a new list such that each element at index…
Problem Statement (Asked By Google) Given a list of integers and a target number k, determine if there exist two…
Problem Statement: Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. Example 1: Input: n = 3…
Given an integer A. Compute and return the square root of A. If A is not a perfect square, return…
Given a zero-based permutation nums (0-indexed), build an array ans of the same length where ans[i] = nums[nums[i]] for each…
A heap is a specialized tree-based data structure that satisfies the heap property. It is commonly used to implement priority…
What is a Trie in DSA? A trie, often known as a prefix tree, is a tree-like data structure used…
What is the Lowest Common Ancestor? In a tree, the lowest common ancestor (LCA) of two nodes, n1 and n2,…