摘要：
Given a singly linked list, return a random node's value from the linked list. Each node must have the same probability of being chosen. Follow up:Wha 阅读全文
posted @ 2017-02-19 19:34
amazingzoe
阅读(138)
评论(0)
推荐(0)
摘要：
Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assum 阅读全文
posted @ 2017-02-19 19:27
amazingzoe
阅读(145)
评论(0)
推荐(0)
摘要：
Given n nodes labeled from 0 to n - 1 and a list of undirected edges (each edge is a pair of nodes), write a function to find the number of connected 阅读全文
posted @ 2017-02-19 19:17
amazingzoe
阅读(176)
评论(0)
推荐(0)
摘要：
Given two 1d vectors, implement an iterator to return their elements alternately. For example, given two 1d vectors: By calling next repeatedly until 阅读全文
posted @ 2017-02-19 17:44
amazingzoe
阅读(161)
评论(0)
推荐(0)
摘要：
Given an array of numbers nums, in which exactly two elements appear only once and all the other elements appear exactly twice. Find the two elements 阅读全文
posted @ 2017-02-19 17:32
amazingzoe
阅读(114)
评论(0)
推荐(0)
摘要：
Given a string, sort it in decreasing order based on the frequency of characters. Example 1: Input: "tree" Output: "eert" Explanation: 'e' appears twi 阅读全文
posted @ 2017-02-19 16:36
amazingzoe
阅读(147)
评论(0)
推荐(0)