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leetcode N-Queens/N-Queens II, backtracking, C++
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
[LeetCode] N-Queens
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
#10 Regular Expression Match
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
[LeetCode] Combination Sum
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
[LeetCode] Combinations
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
[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] Palindrome Partitioning
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
回溯线搜索 Backtracking line search
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
【LeetCode】Word Search 解题报告
【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
[leetcode]算法题目 - Sudoku Solver
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
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