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345. Reverse Vowels of a String Write a function that takes a string as input and reverse only the vowels of a string. Example 1: Given s = "hello", r 阅读全文
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169. Majority Element Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. Y 阅读全文
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217. Contains Duplicate Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears a 阅读全文
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171. Excel Sheet Column Number Related to question Excel Sheet Column Title Given a column title as appear in an Excel sheet, return its corresponding 阅读全文
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242. Valid Anagram Given two strings s and t, write a function to determine if t is an anagram of s. For example, s = "anagram", t = "nagaram", return 阅读全文
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100. Same Tree Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structura 阅读全文
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237. Delete Node in a Linked Lis t Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Suppos 阅读全文
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283. Move Zeroes Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements. 阅读全文
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226. Invert Binary Tree Invert a binary tree. to 阅读全文
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104. Maximum Depth of Binary Tree Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from th 阅读全文
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258. Add Digits Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. For example: Given num = 38, the 阅读全文
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292. Nim Game(C++) You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to 阅读全文
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344. Reverse String Write a function that takes a string as input and returns the string reversed. Example: Given s = "hello", return "olleh". 题目大意： 字 阅读全文
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263. Ugly Number Write a program to check whether a given number is an ugly number. Ugly numbers are positive numbers whose prime factors only include 阅读全文