Introduction In binary search trees (BSTs), the notion of frequency is an interesting one because BSTs are structured to facilitate efficient searching, insertion, and deletion operations based on their unique property: for any given node, all values in the left subtree are less than or equal to the node’s value, and all values in the … Read more
Introduction In this problem, we are given an integer array pref of size n. Our objective is to find and return the array arr of size n that satisfies the condition: pref[i] = arr[0] ^ arr[1] ^ … ^ arr[i]. Here, ^ denotes the bitwise-xor operation. It’s also given that the answer is unique, which … Read more
Introduction The problem “Sort Integers by The Number of 1 Bits” asks us to sort an array of integers based on two criteria: the number of 1’s in their binary representation and the integer value itself. It’s a two-level sorting problem where the primary key for sorting is the count of 1’s in the binary … Read more
Introduction Hi, all. As usual we have encountered another hard problem. But don’t worry we will tackles this.The problem titled “458. Poor Pigs” is a classic example of how mathematical reasoning and logic can be applied to seemingly bizarre scenarios. Given a certain number of buckets with one containing poison, the objective is to determine … Read more
Introduction Strings are a fascinating topic in computer science, offering a myriad of challenges and puzzles. One intriguing problem is understanding the permutations of vowels under specific rules. In the “1220. Count Vowels Permutation” problem, we are tasked with counting the number of possible strings of length ‘n’ formed under certain constraints related to vowel … Read more
Introduction Finding the longest palindromic substring might seem challenging at first, but with the right approach, it’s quite manageable. LeetCode categorizes this problem as having a medium difficulty level. While one could resort to the naive method, it’s worth considering more efficient solutions. Intuition Initially, one might consider examining the longest possible palindrome at the … Read more
Introduction In the intricate realm of algorithmic challenges, there exists a genre of problems that often bewilder many: constructing structures or entities using given constraints. One such fascinating puzzle is the “Binary Trees With Factors” problem, which invites us to explore the vast world of binary trees created from a list of numbers. At its … Read more
Introduction In the vast universe of algorithmic problems, every once in a while, we stumble upon a puzzle that’s as intriguing as it is deceptive. One such riddle is LeetCode’s Problem 779: “K-th Symbol in Grammar.” At first glance, it might seem like a mere exercise in array manipulation. But as we dig deeper, a … Read more
Introduction The world of algorithms is filled with captivating challenges, and today, we’re diving deep into one such intriguing puzzle: the “Maximum Score of a Good Subarray.” At first glance, the problem might seem like a simple array traversal task. But beneath its surface lies a rich tapestry of patterns and logic, waiting to be … Read more
Intuition It is not hard at all!If you read my previous article “Parallel Courses”, you may have already know when to use a greedy approach.I think it is the time. If you examine the previous K summed subsequences, you can easily select the largest one and add it to the value of the current Node … Read more