Problem Statement The Bus Routes LeetCode Solution – “Bus Routes” states that you’re given an array of routes where routes[i] is a bus route such that ith bus repeats the route forever. We’ll be given a bus stop source and we want to reach the bus stop target. We can …
Problem Statement The Subarrays with K Different Integers LeetCode Solution – “Subarrays with K Different Integers” states that you’re given an integer array nums and an integer k. We need to find a total number of good subarrays of nums. A good array is defined as an array with exactly …
Problem Statement : Given an integer array of nums sorted in non-decreasing order, remove some duplicates in place such that each unique element appears at most twice. The relative order of the elements should be kept the same. Since it is impossible to change the length of the array in some languages, you must instead have …
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 K Closest Points to Origin LeetCode Solution – “K Closest Points to Origin” states that given an array of points, x coordinates and y coordinates represent the coordinates on XY Plane. We need to find k closest points to the origin. Note that the distance between two …
Problem Statement The Minimum Remove to Make Valid Parentheses LeetCode Solution – You are given a string s of ‘(‘, ‘)’ and lowercase English characters. Your task is to remove the minimum number of parentheses ( ‘(‘ or ‘)’, in any positions ) so that the resulting parentheses string is …
Problem Statement The Next Permutation LeetCode Solution – “Next Permutation” states that given an array of integers which is a permutation of first n natural numbers. We need to find the next lexicographically smallest permutation of the given array. The replacement must be in-place and use only constant extra space. …
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 Merge k Sorted Lists LeetCode Solution – “Merge k Sorted Lists” states that given the array of k linked lists, where each linked list has its values sorted in ascending order. We need to merge all the k-linked lists into one single linked list and return the …