Problem Statement Check If Array Pairs Are Divisible by k LeetCode Solution – Given an array of integers of even length n and an integer k. We want to divide the array into exactly n/2 pairs such that the sum of each pair is divisible by k. Return true If …
Problem Statement Sort Characters By Frequency LeetCode Solution – Given a string S, sort it in decreasing order based on the frequency of the characters. The frequency of a character is the number of times it appears in the string. Return the sorted string. If there are multiple answers, return any of them. Example for Sort Characters By …
Problem Statement Longest Substring with At Most K Distinct Characters LeetCode Solution – Given a string S and an integer K, return the length of the longest substring of S that contains at most K distinct characters. Example: Test Case 1: Input: S = “bacc” K = 2 Output: 3 Test Case 2: Input: S = “ab” …
Problem Statement The problem Longest Substring with At Least K Repeating Characters LeetCode Solution says given a string S and an integer k, return the length of the longest substring of S such that the frequency of each character in this substring is greater than or equal to k. Example for Longest Substring with At Least …
Problem Statement The Remove Invalid Parentheses Leetcode Solution – states that you’re given a string s that contains parenthesis and lowercase letters. We need to remove the minimum number of invalid parentheses to make the input string valid. We need to return all possible results in any order. A string is …
Problem Statement The Remove Nth Node From End of List Leetcode Solution – states that you are given the head of a linked list and you need to remove the nth node from the end of this list. After deleting this node, return the head of the modified list. Example: Input: …
Problem Statement The Meeting Rooms II LeetCode Solution – “Meeting Rooms II” states that you are given an array of meeting time intervals “intervals” where “intervals[i] = [ start[i], end[i] ]”, return the minimum number of conference rooms required. Example: intervals = [[0,30],[5,10],[15,20]] 2 Explanation: Meeting one can be done …
Problem Statement The Best Time to Buy and Sell Stock LeetCode Solution – “Best Time to Buy and Sell Stock” states that You are given an array of prices where prices[i] is the price of a given stock on an ith day. You want to maximize your profit by choosing …
Problem Statement The number of Islands LeetCode Solution – “Number of Islands” states that you are given an m x n 2D binary grid which represents a map of ‘1’s (land) and ‘0’s (water), you have to return the number of islands. An island is surrounded by water and is …
The problem Check Array Formation Through Concatenation Leetcode Solution provided us with an array of arrays. Along with that we are also given a sequence. We are then told to find if we can somehow construct the given sequence using array of arrays. We can arrange the arrays in any …