CNoodle

摘要： You are given two string arrays words1 and words2. A string b is a subset of string a if every letter in b occurs in a including multiplicity. For exa 阅读全文

摘要： A complete binary tree is a binary tree in which every level, except possibly the last, is completely filled, and all nodes are as far left as possibl 阅读全文

摘要： Design a data structure that simulates an in-memory file system. Implement the FileSystem class: FileSystem() Initializes the object of the system. Li 阅读全文

摘要： A bus has n stops numbered from 0 to n - 1 that form a circle. We know the distance between all pairs of neighboring stops where distance[i] is the di 阅读全文

摘要： Given a string s and an array of strings words, return the number of words[i] that is a subsequence of s. A subsequence of a string is a new string ge 阅读全文

摘要： You are given an array of strings products and a string searchWord. Design a system that suggests at most three product names from products after each 阅读全文

摘要： You are given two string arrays username and website and an integer array timestamp. All the given arrays are of the same length and the tuple [userna 阅读全文

摘要： Let's define a function countUniqueChars(s) that returns the number of unique characters on s. For example, calling countUniqueChars(s) if s = "LEETCO 阅读全文

摘要： You are given an integer array nums. The range of a subarray of nums is the difference between the largest and smallest element in the subarray. Retur 阅读全文

摘要： Given an array of integers arr, find the sum of min(b), where b ranges over every (contiguous) subarray of arr. Since the answer may be large, return 阅读全文

摘要： Given two nodes of a binary tree p and q, return their lowest common ancestor (LCA). Each node will have a reference to its parent node. The definitio 阅读全文

摘要： A string can be abbreviated by replacing any number of non-adjacent, non-empty substrings with their lengths. The lengths should not have leading zero 阅读全文

摘要： You are implementing a program to use as your calendar. We can add a new event if adding the event will not cause a double booking. A double booking h 阅读全文

摘要： A car travels from a starting position to a destination which is target miles east of the starting position. There are gas stations along the way. The 阅读全文

摘要： A parentheses string is a non-empty string consisting only of '(' and ')'. It is valid if any of the following conditions is true: It is (). It can be 阅读全文

摘要： In a linked list of size n, where n is even, the ith node (0-indexed) of the linked list is known as the twin of the (n-1-i)th node, if 0 <= i <= (n / 阅读全文

摘要： Given a string s, find the longest palindromic subsequence's length in s. A subsequence is a sequence that can be derived from another sequence by del 阅读全文

摘要： Given a non-empty array nums containing only positive integers, find if the array can be partitioned into two subsets such that the sum of elements in 阅读全文

摘要： Given a string S with only lowercase characters. Return the number of substrings that contains at least k distinct characters. Example 1: Input: S = " 阅读全文

摘要： There is a row of n houses, where each house can be painted one of three colors: red, blue, or green. The cost of painting each house with a certain c 阅读全文