Directions: Study the following cartoon carefully and write an essay in which you should 1) describe the cartoon, 2) interpret its meaning, and 3) point out its implications in our life. You should write about 160—200 words neatly on ANSWER SH…
[抄题]: Given two non-empty binary trees s and t, check whether tree t has exactly the same structure and node values with a subtree of s. A subtree of s is a tree consists of a node in s and all of this node's descendants. The tree s could also be con…
Given a sorted(increasing order) array with unique integer elements, write an algorithm to create a binary search tree with minimal height. 这道题给了我们一个从小到大排好序的元素不重复的数组,让我们构建一个有最小高度的二分查找树.有两个限制条件,二分查找和最小高度.我们先来看如何树的高度最小,这里就要涉及到平衡二叉树的概念.我们要保证每个node的左右子树的…
hdu4081 Qin Shi Huang's National Road System Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 3342 Accepted Submission(s): 1171 Problem Description During the Warring States Period of ancient…
题目链接: Qin Shi Huang's National Road System Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Problem Description During the Warring States Period of ancient China(476 BC to 221 BC), there were seven kingdoms in Ch…
来之不易的2017第一发ac http://poj.org/problem?id=2386 Lake Counting Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 31474 Accepted: 15724 Description Due to recent rains, water has pooled in various places in Farmer John's field, which is repr…