05 2020 档案
摘要：Eva would like to make a string of beads with her favorite colors so she went to a small shop to buy some beads. There were many colorful strings of b
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摘要：The string APPAPT contains two PAT's as substrings. The first one is formed by the 2nd, the 4th, and the 6th characters, and the second one is formed
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摘要：A family hierarchy is usually presented by a pedigree tree where all the nodes on the same level belong to the same generation. Your task is to find t
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摘要：Zhejiang University has 8 campuses and a lot of gates. From each gate we can collect the in/out times and the plate numbers of the cars crossing the g
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摘要：Among all the factors of a positive integer N, there may exist several consecutive numbers. For example, 630 can be factored as 3×5×6×7, where 5, 6, a
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摘要：Given a singly linked list L with integer keys, you are supposed to remove the nodes with duplicated absolute values of the keys. That is, for each va
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摘要：According to Wikipedia: Insertion sort iterates, consuming one input element each repetition, and growing a sorted output list. Each iteration, insert
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摘要：A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes
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摘要：People on Mars count their numbers with base 13: Zero on Earth is called "tret" on Mars. The numbers 1 to 12 on Earth is called "jan, feb, mar, apr, m
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摘要：There is a classical process named partition in the famous quick sort algorithm. In this process we typically choose one element as the pivot. Then th
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摘要：The following is from Max Howell @twitter: Google: 90% of our engineers use the software you wrote (Homebrew), but you can't invert a binary tree on a
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摘要：The K−P factorization of a positive integer N is to write N as the sum of the P-th power of K positive integers. You are supposed to write a program t
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摘要：opencv安装，之后可以装载自己的模型进行视频预测 pip install opencv-python cv预测转视频脚本 # from keras.layers import Input from frcnn import FRCNN from PIL import Image import n
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摘要：linux配置新的IP在/etc/sysconfig/network-scripts/ifcfg-eth0 此后需要删除/etc/udev/rules.d/70-persistent-rule文件 再service network restart即可
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摘要：Given a sequence of positive numbers, a segment is defined to be a consecutive subsequence. For example, given the sequence { 0.1, 0.2, 0.3, 0.4 }, we
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摘要：This time your job is to fill a sequence of N positive integers into a spiral matrix in non-increasing order. A spiral matrix is filled in from the fi
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摘要：A supply chain is a network of retailers（零售商）, distributors（经销商）, and suppliers（供应商）-- everyone involved in moving a product from supplier to customer
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摘要：When register on a social network, you are always asked to specify your hobbies in order to find some potential friends with the same hobbies. A socia
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摘要：The basic task is simple: given N real numbers, you are supposed to calculate their average. But what makes it complicated is that some of the input n
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摘要：Formation is very important when taking a group photo. Given the rules of forming K rows with N people as the following: The number of people in each
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摘要：Given a tree, you are supposed to tell if it is a complete binary tree. Input Specification: Each input file contains one test case. For each case, th
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摘要：Input our current position and a destination, an online map can recommend several paths. Now your job is to recommend two paths to your user: one is t
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摘要：神经网络(一) 1.机器基本介绍 机器学习简介 是什么？ 无序数据转化为价值的方法 价值？ 数据中抽取规律，进行预测未来 机器学习应用 分类问题？ 图像识别、垃圾邮件 回归问题？ 股价预测、房价预测 排序问题？ 点击率预估、推荐 生成问题？ 图像生成、图像风格转换、图像文字描述生成 2.深度学习简介
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摘要：On a broken keyboard, some of the keys are always stucked. So when you type some sentences, the characters corresponding to those keys will appear rep
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摘要：Given a set of N (>) positive integers, you are supposed to partition them into two disjoint sets A1 and A2 of n1 and n2 numbers, respecti
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摘要：This time, you are supposed to help us collect the data for family-owned property. Given each person's family members, and the estate（房产）info under hi
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摘要：A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes
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摘要："Let's C" is a popular and fun programming contest hosted by the College of Computer Science and Technology, Zhejiang University. Since the idea of th
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摘要：British astronomer Eddington liked to ride a bike. It is said that in order to show off his skill, he has even defined an "Eddington number", E -- tha
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摘要：Some scientists took pictures of thousands of birds in a forest. Assume that all the birds appear in the same picture belong to the same tree. You are
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摘要：Suppose that all the keys in a binary tree are distinct positive integers. A unique binary tree can be determined by a given pair of postorder and ino
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摘要：Two integers are called "friend numbers" if they share the same sum of their digits, and the sum is their "friend ID". For example, 123 and 51 are fri
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摘要："Damn Single (单身狗)" is the Chinese nickname for someone who is being single. You are supposed to find those who are alone in a big party, so they can
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摘要：The "Hamilton cycle problem" is to find a simple cycle that contains every vertex in a graph. Such a cycle is called a "Hamiltonian cycle". In this pr
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摘要：An AVL tree is a self-balancing binary search tree. In an AVL tree, the heights of the two child subtrees of any node differ by at most one; if at any
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摘要：John got a full mark on PAT. He was so happy that he decided to hold a raffle（抽奖） for his followers on Weibo -- that is, he would select winners from
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摘要：Given some segments of rope, you are supposed to chain them into one rope. Each time you may only fold two segments into loops and chain them into one
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摘要：In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian path which
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摘要：Suppose that all the keys in a binary tree are distinct positive integers. A unique binary tree can be determined by a given pair of postorder and ino
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摘要：The "eight queens puzzle" is the problem of placing eight chess queens on an 8 chessboard so that no two queens threaten each other. Thus, a solution
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摘要：Recommendation system predicts the preference that a user would give to an item. Now you are asked to program a very simple recommendation system that
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摘要：Given a syntax tree (binary), you are supposed to output the corresponding infix expression, with parentheses reflecting the precedences of the operat
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摘要：In the big cities, the subway systems always look so complex to the visitors. To give you some sense, the following figure shows the map of Beijing su
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摘要：Cutting an integer means to cut a K digits lone integer Z into two integers of (K/2) digits long integers A and B. For example, after cutting Z = 1673
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摘要：Given a singly linked list, you are supposed to rearrange its elements so that all the negative values appear before all of the non-negatives, and all
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摘要：A vertex cover of a graph is a set of vertices such that each edge of the graph is incident to at least one vertex of the set. Now given a graph with
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摘要：There is a kind of balanced binary search tree named red-black tree in the data structure. It has the following 5 properties: (1) Every node is either
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摘要：pip install numpy==1.16.0 conda create -n tf-gpu python=3.6 activate tf-gpu pip install tensorflow-gpu==1.13.2 pip install keras==2.1.5
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摘要：Consider a positive integer N written in standard notation with k+1 digits ai as ak⋯a1a0 with 0 for all i and ak>0. Then N is palindrom
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摘要：For a student taking the online course "Data Structures" on China University MOOC (http://www.icourse163.org/), to be qualified for a certificate, he/
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摘要：Suppose that all the keys in a binary tree are distinct positive integers. Given the preorder and inorder traversal sequences, you are supposed to out
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摘要：iven a hash table of size N, we can define a hash function (. Suppose that the linear probing is used to solve collisions, we can easily obtain the st
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摘要：Unlike in nowadays, the way that boys and girls expressing their feelings of love was quite subtle in the early years. When a boy A had a crush on a g
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摘要：有时候发现, MacOS中, 有个叫做mds_stores的进程占了好多CPU, 于是要阻止这个行为, 据说这是Spotlight在建索引然后只要把这个索引的关掉就好了 sudo mdutil -a -i off 打开也很简单: sudo mdutil -a -i on
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摘要：Look-and-say sequence is a sequence of integers as the following: D, D1, D111, D113, D11231, D112213111, ... where D is in [0, 9] except 1. The (n+1)s
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摘要：After each PAT, the PAT Center will announce the ranking of institutions based on their students' performances. Now you are asked to generate the rank
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摘要：A clique is a subset of vertices of an undirected graph such that every two distinct vertices in the clique are adjacent. A maximal clique is a clique
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摘要：The lowest common ancestor (LCA) of two nodes U and V in a tree is the deepest node that has both U and V as descendants. A binary search tree (BST) i
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摘要：Given N integers, you are supposed to find the smallest positive integer that is NOT in the given list. Input Specification: Each input file contains
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摘要：The task of this problem is simple: insert a sequence of distinct positive integers into a hash table first. Then try to find another sequence of inte
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摘要：This is a problem given in the Graduate Entrance Exam in 2018: Which of the following is NOT a topological order obtained from the given directed grap
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摘要：In computer science, a heap is a specialized tree-based data structure that satisfies the heap property: if P is a parent node of C, then the key (the
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摘要：Werewolf（狼人杀） is a game in which the players are partitioned into two parties: the werewolves and the human beings. Suppose that in a game, player #1
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摘要：When shipping goods with containers, we have to be careful not to pack some incompatible goods into the same container, or we might get ourselves in s
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摘要：The "travelling salesman problem" asks the following question: "Given a list of cities and the distances between each pair of cities, what is the shor
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摘要：The lowest common ancestor (LCA) of two nodes U and V in a tree is the deepest node that has both U and V as descendants. Given any two nodes in a bin
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摘要：In July 2004, Google posted on a giant billboard along Highway 101 in Silicon Valley (shown in the picture below) for recruitment. The content is supe
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摘要：A registration card number of PAT consists of 4 parts: the 1st letter represents the test level, namely, T for the top level, A for advance and B for
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摘要：A proper vertex coloring is a labeling of the graph's vertices with colors such that no two vertices sharing the same edge have the same color. A colo
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摘要：In computer science, a heap is a specialized tree-based data structure that satisfies the heap property: if P is a parent node of C, then the key (the
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摘要：7-1 Knuth洗牌法 (20分) Knuth 洗牌法是生成 { 1, 2, ..., n } 的一个随机重排列的算法。与每次反复随机生成一个数字，直到获得一个不重复的新数字的算法不同，Knuth 洗牌法从原始序列 { 1, 2, ..., n } 开始，逐次洗牌。洗牌的方法是从左到右，每轮从没确
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