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Leetcode_Validate Binary Search Tree
Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the node's key.Th...
分类:其他好文   时间:2014-08-05 09:43:39    阅读次数:191
POJ 1041 John's trip 无向图的【欧拉回路】路径输出
欧拉回路第一题TVT本题的一个小技巧在于:【建立一个存放点与边关系的邻接矩阵】1.先判断是否存在欧拉路径无向图:欧拉回路:连通 + 所有定点的度为偶数欧拉路径:连通 + 除源点和终点外都为偶数有向图:欧拉回路:连通 + 所有点的入度 == 出度欧拉路径:连通 + 源点 出度-入度=1 && 终点 入...
分类:其他好文   时间:2014-08-04 23:57:58    阅读次数:588
poj2387-Til the Cows Come Home dijkstra入门水题
Til the Cows Come Home Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 29539   Accepted: 9927 Description Bessie is out in the field and wants to get back to...
分类:其他好文   时间:2014-08-04 21:37:48    阅读次数:361
POJ - 2991 Crane (线段树+计算几何)
Description ACM has bought a new crane (crane -- je?áb) . The crane consists of n segments of various lengths, connected by flexible joints. The end of the i-th segment is joined to the beginning o...
分类:其他好文   时间:2014-08-04 17:55:37    阅读次数:240
The Romantic Hero
Problem DescriptionThere is an old country and the king fell in love with a devil. The devil always asks the king to do some crazy things. Although th...
分类:其他好文   时间:2014-08-04 17:32:07    阅读次数:290
[LeetCode] Distinct Subsequences(DP)
Given a string S and a string T, count the number of distinct subsequences of T in S.A subsequence of a string is a new string which is formed from th...
分类:其他好文   时间:2014-08-04 13:50:57    阅读次数:208
poj 1990 mooFest
I -MooFestTime Limit:1000MSMemory Limit:30000KB64bit IO Format:%I64d & %I64uSubmitStatusDescriptionEvery year, Farmer John's N (1 2 #include 3 #inclu....
分类:其他好文   时间:2014-08-03 23:10:16    阅读次数:331
hdu 2852 KiKi's K-Number
L -KiKi's K-NumberTime Limit:2000MSMemory Limit:32768KB64bit IO Format:%I64d & %I64uSubmitStatusDescriptionFor the k-th number, we all should be very ...
分类:其他好文   时间:2014-08-03 23:10:06    阅读次数:312
poj 2481 Cows
E -CowsTime Limit:3000MSMemory Limit:65536KB64bit IO Format:%I64d & %I64uSubmitStatusDescriptionFarmer John's cows have discovered that the clover gro...
分类:其他好文   时间:2014-08-03 23:02:16    阅读次数:318
TYVJ 1074 武士风度的牛(BFS)
背景 Background农民John有很多牛,他想交易其中一头被Don称为TheKnight的牛。这头牛有一个独一无二的超能力,在农场里像Knight一样地跳(就是我们熟悉的象棋中马的走法)。虽然这头神奇的牛不能跳到树上和石头上,但是它可以在牧场上随意跳,我们把牧场用一个x,y的坐标图来表示。描述...
分类:其他好文   时间:2014-08-03 20:31:05    阅读次数:297
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