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搜索关键字:two-sum    ( 578个结果
Two Sum (哈希表)
思路是循环一次,每次都判断当前数组索引位置的值在不在hashtable里,不在的话,加入进去,key为数值,value为它的索引值;在的话,取得他的key,记为n(此时n一定小于循环变量i),接下来再在hashtable中查找(target-当前数值)这个数,利用了hashtable中查找元素时间为...
分类:其他好文   时间:2015-06-28 17:04:57    阅读次数:89
Two Sum-n方优化与C++map的使用
LeetCode第一题,刚拿到题目时虽然明知道n方的遍历算法会超时,但还是不信邪的提交了一次,然而编程不存在运气,TLE不可避免。但是之后的思维方式比较直接,我并没有立刻想到O(n)的方法,想了一种先对数组进行排序,利用目标数和待选择的数的关系来减小搜索范围:1.不存在负数:那么比目标数大的数不必搜...
分类:编程语言   时间:2015-06-26 13:27:48    阅读次数:140
Two Sum
工作一年,发现自己的基础非常薄弱,对数据结构相关的知识,不够扎实。决定刷新leetcode题目,巩固下。题目1:Two SumGiven an array of integers, find two numbers such that they add up to a specific target...
分类:其他好文   时间:2015-06-12 14:37:37    阅读次数:105
leetcode笔记:3Sum
leetcode算法题目:3 sum。解题技巧这道题和另外一道题Two Sum很类似,但这道题是在数组中寻找三个数,使得其和为0,同时要求这三个数只能出现一次。...
分类:其他好文   时间:2015-06-12 13:27:43    阅读次数:111
1-Two Sum
问题描述:Given an array of integers, find two numbers such that they add up to a specific target number.The function twoSum should return indices of the t...
分类:其他好文   时间:2015-06-10 13:53:06    阅读次数:104
Leetcode[1]-Two Sum
Given an array of integers, find two numbers such that they add up to a specific target number.The function twoSum should return indices of the two numbers such that they add up to the target, where in...
分类:其他好文   时间:2015-06-09 17:12:28    阅读次数:97
[LeetCode] Two Sum II - Input array is sorted
Problem Description:Given an array of integers that is alreadysorted in ascending order, find two numbers such that they add up to a specific target n...
分类:其他好文   时间:2015-06-09 00:37:25    阅读次数:126
Two Sum 2015年6月8日
Given an array of integers, find two numbers such that they add up to a specific target number.The function twoSum should return indices of the two nu...
分类:其他好文   时间:2015-06-08 11:32:17    阅读次数:106
LeetCode1 Two Sum
题目: Given an array of integers, find two numbers such that they add up to a specific target number. The function twoSum should return indices of the two numbers such that they add up to the target,w...
分类:其他好文   时间:2015-06-06 14:59:04    阅读次数:124
[LeetCode] Two Sum III - Data structure Design
Problem Description:Design and implement a TwoSum class. It should support the following operations: add and find.add - Add the number to an internal ...
分类:其他好文   时间:2015-06-05 13:57:47    阅读次数:168
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