Problem Statement Valid Anagram Leetcode Solution – Given two strings s and t, return true if t is an anagram of s, and false otherwise. An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once. Example 1: Input: s = “anagram”, t = “nagaram” Output: …
Problem Statement Sort Colors LeetCode Solution – Given an array nums with n objects colored red, white, or blue, sort them in-place so that objects of the same color are adjacent, with the colors in the order red, white, and blue. We will use the integers 0, 1, and 2 to represent the color red, white, and blue, respectively. …
Problem Statement The Lowest Common Ancestor of a Binary Tree LeetCode Solution – “Lowest Common Ancestor of a Binary Tree” states that given the root of the binary tree and two nodes of the tree. We need to find the lowest common ancestor of these two nodes. The Lowest Common …
Problem Statement The Generate Parentheses LeetCode Solution – “Generate Parentheses” states that given the value of n. We need to generate all combinations of n pairs of parentheses. Return the answer in the form of a vector of strings of well-formed parentheses. Example: Input: n = 3 Output: [“((()))”,”(()())”,”(())()”,”()(())”,”()()()”] Explanation: …
Problem Statement The Longest Substring Without Repeating Characters LeetCode Solution – states that given the string s. We need to find the longest substring without repeating characters. Example: Input: s = “abcabcbb” Output: 3 Explanation: The longest substring with no characters being repeated is of length 3. The string is: “abc”. Input: s = “bbbbb” …
Problem Statement The Valid Parentheses LeetCode Solution – “Valid Parentheses” states that you’re given a string containing just the characters ‘(‘, ‘)’, ‘{‘, ‘}’, ‘[‘ and ‘]’. We need to determine whether the input string is a valid string or not. A string is said to be a valid string if open brackets must be closed …
Problem Statement Analyze User Website Visit Pattern LeetCode Solution – You are given two string arrays username and website and an integer array timestamp. All the given arrays are of the same length and the tuple [username[i], website[i], timestamp[i]] indicates that the user username[i] visited the website website[i] at time timestamp[i]. A pattern is a list of three websites (not necessarily distinct). For example, [“home”, …
Problem Statement Find Median from Data Stream LeetCode Solution – The median is the middle value in an ordered integer list. If the size of the list is even, there is no middle value and the median is the mean of the two middle values. For example, for arr = [2,3,4], the median …
Problem Statement Intersection of Two Linked Lists LeetCode Solution – We are given the heads of two strongly linked-lists headA and headB. It is also given that the two linked lists may intersect at some point. We are asked to return the node at which they intersect or null if …
Problem Statement The Moving Average from Data Stream LeetCode Solution – “Moving Average from Data Stream” states that given a stream of integers and a window size k. We need to calculate the moving average of all the integers in the sliding window. If the number of elements in the …