原题地址:https://oj.leetcode.com/problems/n-queens/题意:经典的N皇后问题。解题思路:这类型问题统称为递归回溯问题,也可以叫做对决策树的深度优先搜索(dfs)。N皇后问题有个技巧的关键在于棋盘的表示方法,这里使用一个数组就可以表达了。比如board=[1, ...
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编程语言 时间:
2014-09-21 13:02:00
阅读次数:
208
DescriptionChosen Problem Solving and Program design as an optional course, you are required to solve all kinds of problems. Here, we get a new proble...
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其他好文 时间:
2014-09-20 17:03:49
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304
https://oj.leetcode.com/problems/combinations/Given two integers n and k, return all possible combinations of k numbers out of 1 ... n.For example,If ...
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编程语言 时间:
2014-09-20 09:58:07
阅读次数:
204
原题地址:https://oj.leetcode.com/problems/next-permutation/题意:Implement next permutation, which rearranges numbers into the lexicographically next greater...
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编程语言 时间:
2014-09-20 07:44:56
阅读次数:
241
题目: https://oj.leetcode.com/problems/integer-to-roman/Given an integer, convert it to a roman numeral.Input is guaranteed to be within the range from ...
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编程语言 时间:
2014-09-17 06:46:11
阅读次数:
285
题目:https://oj.leetcode.com/problems/roman-to-integer/Given a roman numeral, convert it to an integer.Input is guaranteed to be within the range from 1...
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编程语言 时间:
2014-09-17 06:45:51
阅读次数:
269
*Export Aborted Export aborted because fatal Lin error were founds. These are listed in the problems view. Either fix these before running Export Again, or turn off "Run full error check when expor...
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移动开发 时间:
2014-09-16 19:18:02
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287
This model generalizes logistic regression to classification problems where the class label y can take on more than two possible values. Softmax regre...
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其他好文 时间:
2014-09-16 12:06:50
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891
题目:https://oj.leetcode.com/problems/add-binary/Given two binary strings, return their sum (also a binary string).For example,a = "11"b = "1"Return "10...
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编程语言 时间:
2014-09-16 10:31:00
阅读次数:
174
原题地址:https://oj.leetcode.com/problems/valid-palindrome/题意:Given a string, determine if it is a palindrome, considering only alphanumeric characters an...
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编程语言 时间:
2014-09-16 08:05:40
阅读次数:
239