SteveYu - 博客园

2020年5月5日

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 阅读全文

posted @ 2020-05-05 18:23 SteveYu 阅读(188) 评论(0) 推荐(0)

1130 Infix Expression (25分)

摘要： Given a syntax tree (binary), you are supposed to output the corresponding infix expression, with parentheses reflecting the precedences of the operat 阅读全文

posted @ 2020-05-05 16:28 SteveYu 阅读(180) 评论(0) 推荐(0)

1131 Subway Map (30分)

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 阅读全文

posted @ 2020-05-05 15:20 SteveYu 阅读(169) 评论(0) 推荐(0)

2020年5月4日

1132 Cut Integer (20分)

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 阅读全文

posted @ 2020-05-04 17:42 SteveYu 阅读(195) 评论(0) 推荐(0)

1133 Splitting A Linked List (25分)

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 阅读全文

posted @ 2020-05-04 17:23 SteveYu 阅读(187) 评论(0) 推荐(0)

1134 Vertex Cover (25分)

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 阅读全文

posted @ 2020-05-04 16:56 SteveYu 阅读(189) 评论(0) 推荐(1)

1135 Is It A Red-Black Tree (30分)

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 阅读全文

posted @ 2020-05-04 15:58 SteveYu 阅读(220) 评论(0) 推荐(0)

2020年5月3日

tensorflow 1.0的部分项目配置匹配

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 阅读全文

posted @ 2020-05-03 20:14 SteveYu 阅读(197) 评论(0) 推荐(0)

1136 A Delayed Palindrome (20分)

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 阅读全文

posted @ 2020-05-03 18:16 SteveYu 阅读(193) 评论(0) 推荐(0)

1137 Final Grading (25分)

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/ 阅读全文

posted @ 2020-05-03 17:28 SteveYu 阅读(226) 评论(0) 推荐(0)

1138 Postorder Traversal (25分)

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 阅读全文

posted @ 2020-05-03 16:45 SteveYu 阅读(151) 评论(0) 推荐(0)

11-散列4 Hashing - Hard Version (30分)

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 阅读全文

posted @ 2020-05-03 16:30 SteveYu 阅读(179) 评论(0) 推荐(0)

1139 First Contact (30分)

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 阅读全文

posted @ 2020-05-03 14:39 SteveYu 阅读(156) 评论(0) 推荐(0)

Mac系统mds、mds_stores、mdworker疯狂工作的问题

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 阅读全文

posted @ 2020-05-03 13:00 SteveYu 阅读(2498) 评论(0) 推荐(0)

2020年5月2日

1140 Look-and-say Sequence (20分)

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 阅读全文

posted @ 2020-05-02 16:46 SteveYu 阅读(158) 评论(0) 推荐(0)

Steve Yu

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