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摘要： 题目要求 Given two strings s and t , write a function to determine if t is an anagram of s. 题目分析及思路 给出两个字符串s和t，要求判断t是否是s的一个anagram，即由相同的字母且不同的字母顺序组成。可以使用c 阅读全文

摘要： 题目要求 Roman numerals are represented by seven different symbols: I, V, X, L, C, Dand M. For example, two is written as II in Roman numeral, just two on 阅读全文

摘要： 题目要求 Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume tha 阅读全文

摘要： 题目要求 Design a HashSet without using any built-in hash table libraries. To be specific, your design should include these functions: add(value): Insert 阅读全文

摘要： 题目要求 Given a Binary Search Tree and a target number, return true if there exist two elements in the BST such that their sum is equal to the given targ 阅读全文

摘要： 题目要求 Given a word, you need to judge whether the usage of capitals in it is right or not. We define the usage of capitals in a word to be right when o 阅读全文

摘要： 题目要求 In a binary tree, the root node is at depth 0, and children of each depth k node are at depth k+1. Two nodes of a binary tree are cousins if they 阅读全文

摘要： 题目要求 Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. 题目分析及思路 要求写一个函数，删除一个单链表中的一个结点（除了最后一个 阅读全文

摘要： 题目要求 Given two strings s and t which consist of only lowercase letters. String t is generated by random shuffling string s and then add one more lette 阅读全文

摘要： 题目要求 Give a string s, count the number of non-empty (contiguous) substrings that have the same number of 0's and 1's, and all the 0's and all the 1's 阅读全文