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POJ 1286 Necklace of Beads
Polya定理是个很神奇的东西~ 题目大意: n个珠子串成一个圆,用三种颜色去涂色。问一共有多少种不同的涂色方法。 不同的涂色方法被定义为:如果这种涂色情况翻转,旋转不与其他情况相同就为不同。 解题思路: Polya定理模版题。 对于顺时针长度为i的旋转,为pow(3,__gcd(n,i); 对于翻转,当为奇数时,有:n*pow(3.0,n/2+1);     当为...
分类:其他好文   时间:2014-07-26 02:31:26    阅读次数:201
POJ 2409 Let it Bead
这个题和POJ 1286 是一个题,只不过那是一个颜色数量固定的题而这个不固定。 这是链接:POJ 1286 Necklace of Beads   下面是代码: #include #include #include #include #include #include #include #include #include #include #include #d...
分类:其他好文   时间:2014-07-26 02:30:16    阅读次数:198
【leetcode刷题笔记】Regular Expression Matching
Implement regular expression matching with support for'.'and'*'.'.' Matches any single character.'*' Matches zero or more of the preceding element.The...
分类:其他好文   时间:2014-07-26 01:37:06    阅读次数:221
【leetcode刷题笔记】Insert Interval
Given a set ofnon-overlappingintervals, insert a new interval into the intervals (merge if necessary).You may assume that the intervals were initially...
分类:其他好文   时间:2014-07-26 00:37:46    阅读次数:237
【leetcode刷题笔记】Multiply Strings
Given two numbers represented as strings, return multiplication of the numbers as a string.Note: The numbers can be arbitrarily large and are non-nega...
分类:其他好文   时间:2014-07-26 00:23:26    阅读次数:242
【leetcode刷题笔记】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:2014-07-26 00:05:16    阅读次数:301
【leetcode刷题笔记】Sudoku Solver
Write a program to solve a Sudoku puzzle by filling the empty cells.Empty cells are indicated by the character'.'.You may assume that there will be on...
分类:其他好文   时间:2014-07-25 14:18:51    阅读次数:284
【leetcode刷题笔记】4Sum
Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the sum of ...
分类:其他好文   时间:2014-07-25 14:13:21    阅读次数:317
【leetcode刷题笔记】Maximal Rectangle
Given a 2D binary matrix filled with 0's and 1's, find the largest rectangle containing all ones and return its area.题解,很巧妙的一道题,对于一个0-1矩阵,它的每一行及以上都可以看...
分类:其他好文   时间:2014-07-25 10:53:01    阅读次数:292
【leetcode刷题笔记】Substring with Concatenation of All Words
You are given a string,S, and a list of words,L, that are all of the same length. Find all starting indices of substring(s) in S that is a concatenati...
分类:其他好文   时间:2014-07-25 02:31:14    阅读次数:210
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