2017年9月13日
540. Single Element in a Sorted Array (Medium)
摘要： Given a sorted array consisting of only integers where every element appears twice except for one element which appears once. Find this single element 阅读全文
posted @ 2017-09-13 18:59 Yancea 阅读(167) 评论(0) 推荐(0)
563. Binary Tree Tilt (Easy)
摘要： Given a binary tree, return the tilt of the whole tree. The tilt of a tree node is defined as the absolute difference between the sum of all left subt 阅读全文
posted @ 2017-09-13 18:23 Yancea 阅读(103) 评论(0) 推荐(0)
2017年9月12日
404. Sum of Left Leaves (Easy)
摘要： Find the sum of all left leaves in a given binary tree. Example: 3 / \ 9 20 / \ 15 7 There are two left leaves in the binary tree, with values 9 and 1 阅读全文
posted @ 2017-09-12 23:35 Yancea 阅读(81) 评论(0) 推荐(0)
167. Two Sum II - Input array is sorted (Easy)
摘要： Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number. The function 阅读全文
posted @ 2017-09-12 16:11 Yancea 阅读(130) 评论(0) 推荐(0)
653. Two Sum IV - Input is a BST (Easy)
摘要： 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 target. E 阅读全文
posted @ 2017-09-12 15:28 Yancea 阅读(160) 评论(0) 推荐(0)
122. Best Time to Buy and Sell Stock II (Easy)
摘要： Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may comple 阅读全文
posted @ 2017-09-12 15:11 Yancea 阅读(145) 评论(0) 推荐(0)
455. Assign Cookies (Easy)
摘要： Assume you are an awesome parent and want to give your children some cookies. But, you should give each child at most one cookie. Each child i has a g 阅读全文
posted @ 2017-09-12 14:23 Yancea 阅读(131) 评论(0) 推荐(0)
383. Ransom Note (Easy)
摘要： Given an arbitrary ransom note string and another string containing letters from all the magazines, write a function that will return true if the rans 阅读全文
posted @ 2017-09-12 10:54 Yancea 阅读(157) 评论(0) 推荐(0)
2017年9月11日
627. Swap Salary (Easy)
摘要： Given a table salary, such as the one below, that has m=male and f=female values. Swap all f and m values (i.e., change all f values to m and vice ver 阅读全文
posted @ 2017-09-11 22:38 Yancea 阅读(149) 评论(0) 推荐(0)
561. Array Partition I (Easy)
摘要： Given an array of 2n integers, your task is to group these integers into n pairs of integer, say (a1, b1), (a2, b2), ..., (an, bn) which makes sum of 阅读全文
posted @ 2017-09-11 22:34 Yancea 阅读(131) 评论(0) 推荐(0)