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RSS订阅原创 1060. Are They Equal (25)
If a machine can save only 3 significant digits, the float numbers 12300 and 12358.9 are considered equal since they are both saved as 0.123*105 with simple chopping. Now given the number of significa
2013-12-19 22:01:00
538
原创 1067. Sort with Swap(0,*)
Given any permutation of the numbers {0, 1, 2,..., N-1}, it is easy to sort them in increasing order. But what if Swap(0, *) is the ONLY operation that is allowed to use? For example, to sort {4, 0, 2
2013-10-16 16:55:53
1443
原创 1047. Student List for Course (25)
Zhejiang University has 40000 students and provides 2500 courses. Now given the registered course list of each student, you are supposed to output the student name lists of all the courses.Input S
2013-10-16 11:17:41
423
原创 1054. The Dominant Color (20)
Behind the scenes in the computer's memory, color is always talked about as a series of 24 bits of information for each pixel. In an image, the color with the largest proportional area is called the d
2013-10-15 22:11:39
443
原创 1043. Is It a Binary Search Tree (25)
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 with keys less than the node's key.The righ
2013-10-15 21:48:13
537
原创 1064. Complete Binary Search Tree (30)
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 with keys less than the node's key.The righ
2013-10-15 16:40:35
1376
原创 1065. A+B and C (64bit) (20)
Given three integers A, B and C in [-263, 263], you are supposed to tell whether A+B > C.Input Specification:The first line of the input gives the positive number of test cases, T (Output
2013-10-14 20:41:30
1472
1
原创 1046. Shortest Distance (20)
The task is really simple: given N exits on a highway which forms a simple cycle, you are supposed to tell the shortest distance between any pair of exits.Input Specification:Each input file c
2013-09-26 22:02:49
516
原创 1063. Set Similarity (25)
Given two sets of integers, the similarity of the sets is defined to be Nc/Nt*100%, where Nc is the number of distinct common numbers shared by the two sets, and Nt is the total number of distinct n
2013-09-26 20:49:28
1043
原创 1040. Longest Symmetric String (25)
Given a string, you are supposed to output the length of the longest symmetric sub-string. For example, given "Is PAT&TAP symmetric?", the longest symmetric sub-string is "s PAT&TAP s", hence you must
2013-09-26 20:00:47
1064
原创 1062. Talent and Virtue (25)
About 900 years ago, a Chinese philosopher Sima Guang wrote a history book in which he talked about people's talent and virtue. According to his theory, a man being outstanding in both talent and virt
2013-09-26 16:37:46
570
原创 1061. Dating (20)
Sherlock Holmes received a note with some strange strings: "Let's date! 3485djDkxh4hhGE 2984akDfkkkkggEdsb s&hgsfdk d&Hyscvnm". It took him only a minute to figure out that those strange strings are a
2013-09-26 15:28:40
527
原创 1048. Find Coins (25)
Eva loves to collect coins from all over the universe, including some other planets like Mars. One day she visited a universal shopping mall which could accept all kinds of coins as payments. However,
2013-09-26 13:48:12
440
原创 042. Shuffling Machine (20)
Shuffling is a procedure used to randomize a deck of playing cards. Because standard shuffling techniques are seen as weak, and in order to avoid "inside jobs" where employees collaborate with gambler
2013-09-25 16:26:38
835
原创 1041. Be Unique (20)
Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen from [1, 104]. The first one who bets on
2013-09-24 22:22:55
479
原创 1038. Recover the Smallest Number
Given a collection of number segments, you are supposed to recover the smallest number from them. For example, given {32, 321, 3214, 0229, 87}, we can recover many numbers such like 32-321-3214-0229-8
2013-09-24 21:48:05
498
原创 1052. Linked List Sorting (25)
A linked list consists of a series of structures, which are not necessarily adjacent in memory. We assume that each structure contains an integer key and a Next pointer to the next structure. Now give
2013-09-23 09:37:59
466
原创 1050. String Subtraction (20)
时间限制10 ms内存限制32000 kB代码长度限制16000 B判题程序StandardGiven two strings S1 and S2, S = S1 - S2 is defined to be the remaining string after taking all th
2013-09-22 16:44:30
774
原创 Prime Factors
Given any positive integer N, you are supposed to find all of its prime factors, and write them in the format N = p1^k1 * p2^k2 *…*pm^km.Input Specification:Each input file contains one test c
2013-08-08 15:06:58
382
原创 A+B in Hogwarts
If you are a fan of Harry Potter, you would know the world of magic has its own currency system -- as Hagrid explained it to Harry, "Seventeen silver Sickles to a Galleon and twenty-nine Knuts to a Si
2013-08-07 15:05:34
413
原创 Counting Ones
The task is simple: given any positive integer N, you are supposed to count the total number of 1's in the decimal form of the integers from 1 to N. For example, given N being 12, there are five 1's i
2013-08-07 14:27:07
474
原创 Boys vs Girls
This time you are asked to tell the difference between the lowest grade of all the male students and the highest grade of all the female students.Input Specification:Each input file contai
2013-08-07 10:33:43
510
原创 Password
To prepare for PAT, the judge sometimes has to generate random passwords for the users. The problem is that there are always some confusing passwords since it is hard to distinguish 1 (one) from l (L
2013-08-07 10:25:36
421
转载 Python字符编码详解
本文简单介绍了各种常用的字符编码的特点，并介绍了在python2.x中如何与编码问题作战 ：） 请注意本文关于Python的内容仅适用于2.x，3.x中str和unicode有翻天覆地的变化，请查阅其他相关文档。 尊重作者的劳动，转载请注明作者及原文地址 >.1. 字符编码简介1.1. ASCIIASCII(American Standard Code for
2013-05-04 14:26:42
415
原创 Emergency
As an emergency rescue team leader of a city, you are given a special map of your country. The map shows several scattered cities connected by some roads. Amount of rescue teams in each city and the l
2012-04-23 18:09:57
450
原创 Head of a Gang
One way that the police finds the head of a gang is to check people's phone calls. If there is a phone call between A and B, we say that A and B is related. The weight of a relation is defined to be t
2012-04-23 14:47:12
1719
原创 Deepest Root
A graph which is connected and acyclic can be considered a tree. The height of the tree depends on the selected root. Now you are supposed to find the root that results in a highest tree. Such a root
2012-04-20 10:26:53
563
原创 Table Tennis
A table tennis club has N tables available to the public. The tables are numbered from 1 to N. For any pair of players, if there are some tables open when they arrive, they will be assigned to the ava
2012-04-16 19:39:44
564
原创 Median
Given an increasing sequence S of N integers, the median is the number at the middle position. For example, the median of S1={11, 12, 13, 14} is 12, and the median of S2={9, 10, 15, 16, 17} is 15. The
2012-04-14 22:36:41
318
原创 Sharing
To store English words, one method is to use linked lists and store a word letter by letter. To save some space, we may let the words share the same sublist if they share the same suffix. For example,
2012-04-14 22:16:28
268
原创 PAT Ranking
Programming Ability Test (PAT) is organized by the College of Computer Science and Technology of Zhejiang University. Each test is supposed to run simultaneously in several places, and the ranklists w
2012-04-14 22:14:42
301
原创 Palindromic Number
A number that will be the same when it is written forwards or backwards is known as a Palindromic Number. For example, 1234321 is a palindromic number. All single digit numbers are palindromic numbers
2012-04-14 22:13:30
533
原创 Maximum Subsequence Sum
Given a sequence of K integers { N1, N2, ..., NK }. A continuous subsequence is defined to be { Ni, Ni+1, ..., Nj } where 1 <= i <= j <= K. TheMaximum Subsequence is the continuous subsequence which
2012-04-14 22:10:48
390
原创 List Sorting
Excel can sort records according to any column. Now you are supposed to imitate this function.InputEach input file contains one test case. For each case, the first line contains two integers N (<=
2012-04-14 22:09:20
281
原创 Hello World for U
Given any string of N (>=5) characters, you are asked to form the characters into the shape of U. For example, "helloworld" can be printed as:h de ll rlowoThat is, the characters must be pr
2012-04-14 22:07:25
589
原创 Have Fun with Numbers
Notice that the number 123456789 is a 9-digit number consisting exactly the numbers from 1 to 9, with no duplication. Double it we will obtain 246913578, which happens to be another 9-digit number con
2012-04-14 22:06:00
706
原创 Colors in Mars
People in Mars represent the colors in their computers in a similar way as the Earth people. That is, a color is represented by a 6-digit number, where the first 2 digits are for Red, the middle 2 dig
2012-04-14 22:02:05
337
原创 Digital Library
A Digital Library contains millions of books, stored according to their titles, authors, key words of their abstracts, publishers, and published years. Each book is assigned an unique 7-digit number a
2012-03-21 11:11:37
466
原创 Tree Traversals
Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequences, you are supposed to output the level order traversal sequence of the cor
2012-03-20 17:06:43
358
原创 Phone Bills
A long-distance telephone company charges its customers by the following rules:Making a long-distance call costs a certain amount per minute, depending on the time of day when the call is made. Wh
2012-02-26 08:54:05
666
设计模式（design pattern）
2013-12-08
机器学习经典书籍
2013-05-29
空空如也
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