LeetCode 414. Third Maximum Number
Description https://leetcode.com/problems/third-maximum-number/ Given integer array nums, return the third maximum number in this array. If the third maximum does not exist, return…
LeetCode 170. Two Sum III – Data structure design
Description https://leetcode.com/problems/two-sum-iii-data-structure-design/ Design a data structure that accepts a stream of integers and checks if it has a pair of…
LeetCode 434. Number of Segments in a String
Description https://leetcode.com/problems/number-of-segments-in-a-string/ You are given a string s, return the number of segments in the string. A segment is defined to be a contiguous…
LeetCode 1816. Truncate Sentence
Description https://leetcode.com/problems/truncate-sentence/ A sentence is a list of words that are separated by a single space with no leading or trailing spaces.…
LeetCode 1588. Sum of All Odd Length Subarrays
Description https://leetcode.com/problems/sum-of-all-odd-length-subarrays/ Given an array of positive integers arr, calculate the sum of all possible odd-length subarrays. A subarray is a…
LeetCode 1469. Find All The Lonely Nodes
Description https://leetcode.com/problems/find-all-the-lonely-nodes/ In a binary tree, a lonely node is a node that is the only child of its parent node. The…
LeetCode 1720. Decode XORed Array
Description https://leetcode.com/problems/decode-xored-array/ There is a hidden integer array arr that consists of n non-negative integers. It was encoded into another integer array encoded of length n – 1, such…
LeetCode 1773. Count Items Matching a Rule
Description https://leetcode.com/problems/count-items-matching-a-rule/ You are given an array items, where each items[i] = [typei, colori, namei] describes the type, color, and name of the ith item.…
LeetCode 1346. Check If N and Its Double Exist
Description https://leetcode.com/problems/check-if-n-and-its-double-exist/ Given an array arr of integers, check if there exists two integers N and M such that N is the double of M ( i.e. N = 2 *…
LeetCode 1805. Number of Different Integers in a String
Description https://leetcode.com/problems/number-of-different-integers-in-a-string/ You are given a string word that consists of digits and lowercase English letters. You will replace every non-digit character…