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POJ 1330 裸的LCA
Nearest Common AncestorsTime Limit:1000MSMemory Limit:10000KTotal Submissions:17720Accepted:9393DescriptionA rooted tree is a well-known data structur...
分类:其他好文   时间:2014-07-31 02:43:35    阅读次数:327
Maximum Depth of Binary Tree leetcode java
题目:Given a binary tree, find its maximum depth.The maximum depth is the number of nodes along the longest path from the root node down to the farthes....
分类:编程语言   时间:2014-07-31 02:41:15    阅读次数:229
Minimum Depth of Binary Tree leetcode java
题目:Given a binary tree, find its minimum depth.The minimum depth is the number of nodes along the shortest path from the root node down to the neares....
分类:编程语言   时间:2014-07-31 02:30:25    阅读次数:264
Symmetric Tree leetcode java
题目:Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center).For example, this binary tree is symmetric: 1 /...
分类:编程语言   时间:2014-07-31 02:28:25    阅读次数:376
Same Tree leetcode java
题目:Given two binary trees, write a function to check if they are equal or not.Two binary trees are considered equal if they are structurally identica....
分类:编程语言   时间:2014-07-31 02:24:15    阅读次数:211
[LeetCode] Binary Tree Maximum Path Sum(递归)
Given a binary tree, find the maximum path sum.The path may start and end at any node in the tree.For example: Given the below binary tree, 1 ...
分类:其他好文   时间:2014-07-30 20:33:34    阅读次数:193
Recover Binary Search Tree
Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. Note: A solution using O(n) space is pretty straight...
分类:其他好文   时间:2014-07-30 17:46:04    阅读次数:244
CodeForces 52B Right Triangles 矩阵上的计数
题目链接:点击打开链接 题意: 问有多少个与矩阵边平行的直角三角形,且三角形的3个顶点都是* 对于 L形 或者_| 形的三角形,我们只需要知道在_ 上方有多少个*即可,下底边则任取2个 所以用l[i]表示 第i列的*的个数 然后扫完一行,再把这行的*更新到 l[] 里 从上到下扫一遍得到所有 L _| 的三角形 再从下到上扫一遍 得到 ~| 和 |~ 的。。 #in...
分类:其他好文   时间:2014-07-30 17:30:54    阅读次数:173
UVA 11525 - Permutation(树状数组)
UVA 11525 - Permutation 题目链接 题意:给定一个k个数字,求第n个全排列,由于n很大,输入的方式为∑k1Si?(K?i)! 思路:全排列,很容易看出,前面的si对应的就是数组中第k小的数字,那么问题变成每次找第k小的数字,然后去掉这个数字,这个用树状数组很容易实现 代码: #include #include #define lowbit(...
分类:其他好文   时间:2014-07-30 17:25:44    阅读次数:167
Symmetric Tree
Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center)....
分类:其他好文   时间:2014-07-30 14:48:53    阅读次数:216
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