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 …
Problem Statement Partition Labels LeetCode Solution – You are given a string s. We want to partition the string into as many parts as possible so that each letter appears in at most one part. Note that the partition is done so that after concatenating all the parts in order, the …
Problem Statement Fibonacci Number LeetCode Solution – “Fibonacci Number” states that The Fibonacci numbers, commonly denoted F(n) form a sequence, called the Fibonacci sequence, such that each number is the sum of the two preceding ones, starting from 0 and 1. That is, F(0) = 0, F(1) = 1 F(n) = F(n – 1) + F(n …
Problem Statement The Longest Common Prefix LeetCode Solution – “Longest Common Prefix” states that given an array of strings. We need to find the longest common prefix among these strings. If there doesn’t exist any prefix, return an empty string. Example: Input: strs = [“flower”,”flow”,”flight”] Output: “fl” Explanation: “fl” is the longest …
Problem Statement The Trapping Rain Water LeetCode Solution – “Trapping Rain Water” states that given an array of heights which represents an elevation map where the width of each bar is 1. We need to find the amount of water trapped after rain. Example: Input: height = [0,1,0,2,1,0,1,3,2,1,2,1] Output: 6 Explanation: Check …
Problem Statement The Valid Palindrome II LeetCode Solution – “Valid Palindrome II” states that given the string s, we need to return true if s can be a palindrome string after deleting at most one character. Example: Input: s = “aba” Output: true Explanation: The input string is already palindrome, so there’s …
Problem Statement Valid Tic-Tac-Toe State LeetCode Solution – We are given a Tic-Tac-Toe board as a string array board & are asked to return true iff it is possible to reach this board position during the course of a valid tic-tac-toe game. The board is a 3 x 3 array …
Problem Statement Remove Duplicates from Sorted List LeetCode Solution – We are given the head of a sorted linked list. We are asked to delete all the duplicates such that each element appears only once and return the linked list sorted as well. Examples & Explanations Example 1: Input: head …