09 2018 档案
摘要：Given an array nums containing n + 1 integers where each integer is between 1 and n (inclusive), prove that at least one duplicate number must exist.
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摘要：Given a linked list, return the node where the cycle begins. If there is no cycle, return null. 题意：找一个链表中是否含有环，如果没有则返回null，如果有则返回环的起点 我的解法，投机取巧了，我改了va
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摘要：S and T are strings composed of lowercase letters. In S, no letter occurs more than once. S was sorted in some custom order previously. We want to per
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摘要：Given a binary array, find the maximum length of a contiguous subarray with equal number of 0 and 1. Example 1: Example 2: Note: The length of the giv
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摘要：204. Count Primes 204. Count Primes 204. Count Primes 204. Count Primes Count the number of prime numbers less than a non-negative number, n. Example:
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摘要：Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10n. Example: Input: 2 Output: 91 Explanation: The answer shoul
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摘要：There are N rooms and you start in room 0. Each room has a distinct number in 0, 1, 2, ..., N-1, and each room may have some keys to access the next r
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摘要：Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, determine if s can be segmented into a space-separated sequ
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摘要：Given a function rand7 which generates a uniform random integer in the range 1 to 7, write a function rand10 which generates a uniform random integer
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摘要：题目描述 王强今天很开心，公司发给N元的年终奖。王强决定把年终奖用于购物，他把想买的物品分为两类：主件与附件，附件是从属于某个主件的，下表就是一些主件与附件的例子： 主件 附件 电脑 打印机，扫描仪 书柜 图书 书桌 台灯，文具 工作椅 无 如果要买归类为附件的物品，必须先买该附件所属的主件。每个主
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摘要：Given a Binary Search Tree (BST) with the root node root, return the minimum difference between the values of any two different nodes in the tree. Exa
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摘要：Given a string S, check if the letters can be rearranged so that two characters that are adjacent to each other are not the same. If possible, output
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摘要：Given a positive integer n and you can do operations as follow: If n is even, replace n with n/2. If n is odd, you can replace n with either n + 1 or
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摘要：Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. Example: Follow up:Could you do it without any lo
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摘要：In a given integer array nums, there is always exactly one largest element. Find whether the largest element in the array is at least twice as much as
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摘要：Find all possible combinations of k numbers that add up to a number n, given that only numbers from 1 to 9 can be used and each combination should be
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