leetcode N-Queens/N-Queens II, backtracking, C++...
分类:
编程语言 时间:
2015-07-09 09:47:57
阅读次数:
218
The idea is to use backtracking. In fact, the code below uses DFS, which involves backtracking in a recursive manner.The idea is also very simple. Sta...
分类:
其他好文 时间:
2015-07-01 22:08:25
阅读次数:
175
题目链接:https://leetcode.com/problems/regular-expression-matching/
Implement regular expression matching with support for '.' and '*'.
'.' Matches any single character.
'*' Matches zero or more...
分类:
其他好文 时间:
2015-06-21 18:38:10
阅读次数:
215
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:
2015-06-18 00:43:15
阅读次数:
202
A typical backtracking problem. For any backtracking problem, you need to be think about three ascepts:What is a partial solution and when is it finis...
分类:
其他好文 时间:
2015-06-17 00:38:34
阅读次数:
229
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
The problem has a nice structure that backtracking naturally fits in. The structure is, given a starting positionidx, we search fromidxtill the end of...
分类:
其他好文 时间:
2015-06-04 20:49:11
阅读次数:
107
机器学习中很多数值优化算法都会用到线搜索(line search)。线搜索的目的是在搜索方向上找到是目标函数\(f(x)\)最小的点。然而,精确找到最小点比较耗时,由于搜索方向本来就是近似,所以用较小的代价找到最小点的近似就可以了。Backtracking Line Search(BLS)就是这么一...
分类:
其他好文 时间:
2015-05-27 21:01:50
阅读次数:
957
【题目】
Given a 2D board and a word, find if the word exists in the grid.
The word can be constructed from letters of sequentially adjacent cell, where "adjacent" cells are those horizontally or ...
分类:
其他好文 时间:
2015-05-19 19:13:24
阅读次数:
121
最近,新加坡总理李显龙也写了一份代码公布出来,大致瞧了一眼,竟然是解数独题的代码!前几天刚刚写过,数独主要算法当然是使用回溯法。回溯法当时初学的时候在思路上比较拧,不容易写对。写了几个回溯法的算法之后心里总算有了点底。回溯法的代码一般都是长成下面这样子:void backtracking(int[]...
分类:
编程语言 时间:
2015-05-16 01:26:04
阅读次数:
158