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[LeetCode 39&40] Combination Sum I & II
题目链接:combination-sum import java.util.ArrayList; import java.util.Arrays; import java.util.List; /** * Given a set of candidate numbers (C) and a target number (T), find all unique combin...
分类:其他好文   时间:2015-03-29 09:30:28    阅读次数:159
Leetcode文章整理
LeetCode的题目种类比较多,感觉应该将自己联系过的题目进行分类,这个就是根据自己做过的题目进行划分,并做一定的总结,会持续更新 Sort: Two Pointer: 二叉树: DP: Math: 栈: DFS: LeetCode—**Combination Sum 利用DFS算法 Recursi...
分类:其他好文   时间:2015-03-22 09:24:16    阅读次数:167
LeetCode—**Combination Sum 利用DFS算法
Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. The same repeated number may be chosen from C unlimited numb...
分类:编程语言   时间:2015-03-21 17:10:57    阅读次数:193
机器学习建议(转)
机器学习说简单就简单,说难就难,但如果一个人不够聪明的话,他大概很难知道机器学习哪里难。基本上要学习机器学习,先修课程是algebra, calculus, probability theory, linear regression。这几门科学好了再学Machine learning是事半功倍的。此...
分类:其他好文   时间:2015-03-21 13:52:25    阅读次数:298
组合-Java
二进制解决组合问题:public class CombinationByBinary { public static void combination() { /* * 基本思路:求全组合,则假设原有元素n个,则最终组合结果是2^n个。原因是: 用位操作方法:假设元素原本有:a,b,c三个,则1表示取该元素,0表示不取。故去a则是001,取ab则是011....
分类:编程语言   时间:2015-03-21 11:16:02    阅读次数:149
leetcode------Combination Sum II
标题:Combination Sum II通过率:25.1%难度:中等Given a collection of candidate numbers (C) and a target number (T), find all unique combinations inCwhere the cand...
分类:其他好文   时间:2015-03-20 20:07:07    阅读次数:111
LeetCode – Refresh – Letter Combination of a Phone Number
This is just a combination. Use hashtable to hold the number ==> charsnotes:1. check corner case : input is empty, do not return vector contains empty...
分类:其他好文   时间:2015-03-20 08:03:21    阅读次数:127
LeetCode – Refresh – Combinations
Same algorithm with combination. Input as the (1..n), constraint is that the length of each combine should be k. 1 class Solution { 2 public: 3 vo...
分类:其他好文   时间:2015-03-19 06:20:58    阅读次数:152
LeetCode – Refresh – Combination Sum II
The different between I and II is that:1. For II, each number only can be chosen ONCE.2. The a number, in the array, encountered more than twice will ...
分类:其他好文   时间:2015-03-19 06:18:55    阅读次数:135
LeetCode – Refresh – Combination Sum
This is a classical combination question. 1 class Solution { 2 public: 3 void getComb(vector > &result, const vector &num, vector current, int sum...
分类:其他好文   时间:2015-03-19 06:17:15    阅读次数:97
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