CNoodle

摘要： You have two types of tiles: a 2 x 1 domino shape and a tromino shape. You may rotate these shapes. Given an integer n, return the number of ways to t 阅读全文

摘要： You are given two strings word1 and word2. You want to construct a string merge in the following way: while either word1 or word2 are non-empty, choos 阅读全文

摘要： You are playing a solitaire game with three piles of stones of sizes a​​​​​​, b,​​​​​​ and c​​​​​​ respectively. Each turn you choose two different no 阅读全文

摘要： You are given an integer array nums where the ith bag contains nums[i] balls. You are also given an integer maxOperations. You can perform the followi 阅读全文

摘要： There is a bi-directional graph with n vertices, where each vertex is labeled from 0 to n - 1 (inclusive). The edges in the graph are represented as a 阅读全文

摘要： You are given an integer array nums and two integers limit and goal. The array nums has an interesting property that abs(nums[i]) <= limit. Return the 阅读全文

摘要： There is a binary tree rooted at 0 consisting of n nodes. The nodes are labeled from 0 to n - 1. You are given a 0-indexed integer array parents repre 阅读全文

摘要： Given an integer n, return true if it is possible to represent n as the sum of distinct powers of three. Otherwise, return false. An integer y is a po 阅读全文

摘要： You are given two arrays of integers nums1 and nums2, possibly of different lengths. The values in the arrays are between 1 and 6, inclusive. In one o 阅读全文

摘要： You are given a string word that consists of digits and lowercase English letters. You will replace every non-digit character with a space. For exampl 阅读全文

摘要： You are given a 0-indexed integer array nums of length n. nums contains a valid split at index i if the following are true: The sum of the first i + 1 阅读全文

摘要： You are given a 0-indexed integer array nums of length n. The average difference of the index i is the absolute difference between the average of the  阅读全文

摘要： You have n boxes. You are given a binary string boxes of length n, where boxes[i] is '0' if the ith box is empty, and '1' if it contains one ball. In 阅读全文

摘要： Given an array of integers arr, return true if the number of occurrences of each value in the array is unique, or false otherwise. Example 1: Input: a 阅读全文

摘要： You are given a string s consisting only of the characters '0' and '1'. In one operation, you can change any '0' to '1' or vice versa. The string is c 阅读全文

摘要： You are given an integer array matches where matches[i] = [winneri, loseri] indicates that the player winneri defeated player loseri in a match. Retur 阅读全文

摘要： Given an array nums, return true if the array was originally sorted in non-decreasing order, then rotated some number of positions (including zero). O 阅读全文

摘要： Sometimes people repeat letters to represent extra feeling. For example: "hello" -> "heeellooo" "hi" -> "hiiii" In these strings like "heeellooo", we 阅读全文

摘要： Given an integer array nums and two integers left and right, return the number of contiguous non-empty subarrays such that the value of the maximum ar 阅读全文

摘要： An n x n matrix is valid if every row and every column contains all the integers from 1 to n (inclusive). Given an n x n integer matrix matrix, return 阅读全文