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[LeetCode] Unique Paths II(DP)
Follow up for "Unique Paths":Now consider if some obstacles are added to the grids. How many unique paths would there be?An obstacle and empty space i...
分类:其他好文   时间:2014-08-05 18:09:19    阅读次数:168
LeetCode第五题,Longest Palindromic Substring
题目原文: Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longest palindromic substring. 题意解析: 最长回文子串。就是...
分类:其他好文   时间:2014-08-05 15:56:59    阅读次数:290
POJ--1679--The Unique MST【kruskal判断MST是否唯一】
链接:http://poj.org/problem?id=1679 题意:告诉你有n个点,m条边,以及m条边的信息(起点、终点、权值),判断最小生成树是否唯一 判断MST是否唯一的思路是这样:对于每条边如果有和他相等权值的边,则做一个标记,然后进行一遍kruskal或prim找出最小生成树权值,然后对于每个使用过并且有相等边标记的边,把它从图中删去,再进行一遍kruskal或prim,...
分类:其他好文   时间:2014-08-05 14:12:39    阅读次数:308
Non-unique Elements
Non-unique ElementsYou are given a non-empty list of integers (X). For this task, you should return a list consisting of only the non-unique elements ...
分类:其他好文   时间:2014-08-05 10:48:49    阅读次数:210
Unique Binary Search Trees
问题:n个结点总共有多少个二叉搜索树分析:n=1,sum1=1 n=2,sum2=2; n=3,sum3=2(头结点为1)+1(头结点为2)+2(头结点为3) n=4,sum4=5(头结点为1,sum3)+2(头结点为2,sum1*sum2)+2(头结点为3,sum2*sum1)+...
分类:其他好文   时间:2014-08-04 13:53:47    阅读次数:193
Longest Palindromic Substring leetcode java
题目:Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique lo....
分类:编程语言   时间:2014-08-04 04:10:26    阅读次数:374
POJ 1679 The Unique MST
最小生成树的唯一性,POJ 1679 The Unique MST...
分类:其他好文   时间:2014-08-03 10:19:25    阅读次数:261
poj 1679 The Unique MST (次小生成树)
The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 20293   Accepted: 7124 Description Given a connected undirected graph, tell if its minimum spa...
分类:其他好文   时间:2014-08-02 20:58:54    阅读次数:362
Unique Paths
问题:从起点到终点总共有多少条路径分析:f[x,y]=f[x+1,y]+f[x,y+1],用记忆化搜索就可以解决了class Solution {public: int num[110][110]; int dfs(int m,int n,int x,int y) { ...
分类:其他好文   时间:2014-08-02 20:39:33    阅读次数:165
LeetCode——Unique Binary Search Trees
Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example, Given n = 3, there are a total of 5 unique BST's. 1 3 3 2 1 \ ...
分类:其他好文   时间:2014-08-02 15:34:34    阅读次数:221
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