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欧拉计划(python) problem 29
Distinct powers Problem 29 Consider all integer combinations of ab for 2 ≤ a ≤ 5 and 2 ≤ b ≤ 5: 22=4, 23=8, 24=16, 25=32 32=9, 33=27, 34=81, 35=243 42=16, 43=64, 44=256, 45=1024 52=25, 5...
分类:编程语言   时间:2015-06-17 21:36:18    阅读次数:220
[LeetCode] Letter Combinations of a Phone Number
Well, a typical backtracking problem. Make sure you are clear with the following three problems:What is a partial solution and when is it finished? --...
分类:其他好文   时间:2015-06-17 00:34:16    阅读次数:142
[LeetCode] #40 Combination Sum II
Given a collection of candidate numbers (C) and a target number (T), find all unique combinations inCwhere the candidate numbers sums toT.Each number ...
分类:其他好文   时间:2015-06-16 22:46:41    阅读次数:106
[LeetCode] #38 Combination Sum
Given a set of candidate numbers (C) and a target number (T), find all unique combinations inCwhere the candidate numbers sums toT.Thesamerepeated num...
分类:其他好文   时间:2015-06-16 22:46:25    阅读次数:134
LeetCode之“字符串”:Restore IP Addresses
题目链接 题目要求: Given a string containing only digits, restore it by returning all possible valid IP address combinations. For example: Given"2552551...
分类:其他好文   时间:2015-06-15 00:15:50    阅读次数:113
Leetcode 17 Letter Combinations of a Phone Number
Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit to letters (just like on the telephon...
分类:其他好文   时间:2015-06-14 21:13:20    阅读次数:125
LeetCode 22 Generate Parentheses
Givennpairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, givenn= 3, a solution set is:"((()))...
分类:其他好文   时间:2015-06-13 01:09:41    阅读次数:158
Java for LeetCode 216 Combination Sum III
Find all possible combinations of k numbers that add up to a number n, given that only numbers from 1 to 9 can be used and each combination should be ...
分类:编程语言   时间:2015-06-09 23:16:23    阅读次数:144
【Machine Learning】机器学习の特征
绘制了一张导图,有不对的地方欢迎指正:下载地址机器学习中,特征是很关键的.其中包括,特征的提取和特征的选择.他们是降维的两种方法,但又有所不同:特征抽取(Feature Extraction):Creatting a subset of new features by combinations of...
分类:系统相关   时间:2015-06-09 13:31:22    阅读次数:422
Restore IP Addresses
Given a string containing only digits, restore it by returning all possible valid IP address combinations.For example:Given"25525511135",return["255.2...
分类:其他好文   时间:2015-06-09 11:31:09    阅读次数:101
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