Sheryl Wang - 博客园

Triangle Count

摘要： Given an array of integers, how many three numbers can be found in the array, so that we can build an triangle whose three edges length is the three n 阅读全文

posted @ 2016-06-06 15:27 Sheryl Wang 阅读(483) 评论(0) 推荐(0)

Two Sum II

摘要： Given an array of integers, find how many pairs in the array such that their sum is bigger than a specific target number. Please return the number of 阅读全文

posted @ 2016-06-06 15:07 Sheryl Wang 阅读(183) 评论(0) 推荐(0)

Subarray Sum

摘要：给定一个整数数组，找到和为零的子数组。你的代码应该返回满足要求的子数组的起始位置和结束位置。比如给出 [-3, 1, 2, -3, 4]，返回[0, 2] 或者 [1, 3]. Lintcode上的一道题目，这一题我开始想到的是brute force的方法，求出所有子数组，并判断和是否为0。子数组一阅读全文

posted @ 2016-06-02 22:36 Sheryl Wang 阅读(393) 评论(0) 推荐(0)

Intersection of Two Arrays

摘要： Given two arrays, write a function to compute their intersection. Example:Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2]. Note: Each element i 阅读全文

posted @ 2016-06-02 22:19 Sheryl Wang 阅读(153) 评论(0) 推荐(0)

Reorder List

摘要： Given a singly linked list L: L0→L1→…→Ln-1→Ln,reorder it to: L0→Ln→L1→Ln-1→L2→Ln-2→… You must do this in-place without altering the nodes' values. For 阅读全文

posted @ 2016-06-01 21:46 Sheryl Wang 阅读(146) 评论(0) 推荐(0)

Convert Sorted List to Binary Search Tree

摘要： Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 看到这题我想到的直接的做法是每次找到链表的中间结点（slow 和 fast双指针阅读全文

posted @ 2016-05-31 22:23 Sheryl Wang 阅读(154) 评论(0) 推荐(0)

Remove Duplicates from Sorted List II

摘要： Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. For example,Given 1->2 阅读全文

posted @ 2016-05-30 22:07 Sheryl Wang 阅读(177) 评论(0) 推荐(0)

Partition List

摘要： Given a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x. You should preserve the 阅读全文

posted @ 2016-05-30 20:12 Sheryl Wang 阅读(131) 评论(0) 推荐(0)

Linked List Cycle II

摘要： Given a linked list, return the node where the cycle begins. If there is no cycle, return null. Note: Do not modify the linked list. Follow up:Can you 阅读全文

posted @ 2016-05-30 16:32 Sheryl Wang 阅读(125) 评论(0) 推荐(0)

Sort List

摘要： Sort a linked list in O(n log n) time using constant space complexity. 题目要求用 O(n log n)的时间复杂度和常数的空间复杂度来进行链表排序。 O(nlogn)的排序算法有堆排，快排，归并排序等，一开始我准备采用快排，后来阅读全文

posted @ 2016-05-30 15:40 Sheryl Wang 阅读(175) 评论(0) 推荐(0)