yu121380的博客

1063Set Similarity(25分)Given two sets of integers, the similarity of the sets is defined to beN​c​​/N​t​​×100%, whereN​c​​is the number of distinct common numbers shared by the two sets, andN...

1049Counting Ones（30分)The task is simple: given any positive integerN, you are supposed to count the total number of 1's in the decimal form of the integers from 1 toN. For example, givenNbei...

1048Find Coins（25分)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 coi...

1037Magic Coupon（25分)The magic shop in Mars is offering some magic coupons. Each coupon has an integerNprinted on it, meaning that when you use this coupon with a product, you may getNtimes t...

1042Shuffling Machine（20分)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 emp...

1041Be Unique（20分)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 [1,10​4​​]. T...

1036Boys vs Girls（25分)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:Eac...

1035Password（20分)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 distingu...

1040Longest Symmetric String（25分)Given a string, you are supposed to output the length of the longest symmetric sub-string. For example, givenIs PAT&TAP symmetric?, the longest symmetric sub...

1039Course List for Student（25分)Zhejiang University has 40000 students and provides 2500 courses. Now given the student name lists of all the courses, you are supposed to output the registered co...

1025PAT Ranking（25分)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 pl...

1032Sharing（25分)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...

1031Hello World for U（20分)Given any string ofN(≥5) characters, you are asked to form the characters into the shape ofU. For example,helloworldcan be printed as:h de ll rlowoThat ...

1024Palindromic Number（25分)A number that will be the same when it is written forwards or backwards is known as aPalindromic Number. For example, 1234321 is a palindromic number. All single digit...

1023Have Fun with Numbers（20分)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 happe...

1038Recover the Smallest Number（30分)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 recove...

1043Is It a Binary Search Tree（25分)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...

1055The World's Richest（25分)Forbes magazine publishes every year its list of billionaires based on the annual ranking of the world's wealthiest people. Now you are supposed to simulate this job, ...

1044 Shopping in Mars （25 分)Shopping in Mars is quite a different experience. The Mars people pay by chained diamonds. Each diamond has a value (in Mars dollars M$). When making the payment, the cha...

1062Talent and Virtue(25分)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 outs...

1061Dating(20分)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 t...

If a machine can save only 3 significant digits, the float numbers 12300 and 12358.9 are considered equal since they are both saved as0.123×10​5​​with simple chopping. Now given the number of signif...

1059Prime Factors（25分)Given any positive integerN, you are supposed to find all of its prime factors, and write them in the formatN=p​1​​​k​1​​​​×p​2​​​k​2​​​​×⋯×p​m​​​k​m​​​​.Input Specifi...

1058A+B in Hogwarts（20分)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 ...

1054The Dominant Color（20分)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 p...

1057Stack（30分)Stack is one of the most fundamental data structures, which is based on the principle of Last In First Out (LIFO). The basic operations include Push (inserting an element onto the t...

1053Path of Equal Weight（30分)Given a non-empty tree with rootR, and with weightW​i​​assigned to each tree nodeT​i​​. Theweight of a path fromRtoLis defined to be the sum of the weights o...

1047Student List for Course（25分)Zhejiang University has 40,000 students and provides 2,500 courses. Now given the registered course list of each student, you are supposed to output the student na...

1052Linked List Sorting（25分)A linked list consists of a series of structures, which are not necessarily adjacent in memory. We assume that each structure contains an integerkeyand aNextpointe...

1046Shortest Distance（20分)The task is really simple: givenNexits on a highway which forms a simple cycle, you are supposed to tell the shortest distance between any pair of exits.Input Specif...

1051Pop Sequence（25分)Given a stack which can keepMnumbers at most. PushNnumbers in the order of 1, 2, 3, ...,Nand pop randomly. You are supposed to tell if a given sequence of numbers is a ...

1050String Subtraction（20分)Given two stringsS​1​​andS​2​​,S=S​1​​−S​2​​is defined to be the remaining string after taking all the characters inS​2​​fromS​1​​. Your task is simply to calcu...

1056 Mice and Rice （25 分)Mice and Rice is the name of a programming contest in which each programmer must write a piece of code to control the movements of a mouse in a given map. The goal of each m...

1045Favorite Color Stripe（30分)Eva is trying to make her own color stripe out of a given one. She would like to keep only her favorite colors in her favorite order by cutting off those unwanted pi...

1034Head of a Gang（30分)One way that the police finds the head of a gang is to check people's phone calls. If there is a phone call betweenAandB, we say thatAandBis related. The weight of a...

1022Digital Library（30分)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 assign...

1030Travel Plan（30分)A traveler's map gives the distances between cities along the highways, together with the cost of each highway. Now you are supposed to write a program to help a traveler to d...

1015Reversible Primes（20 分）Areversible primein any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime beca...

1003 Emergency （25 分）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...

1002 A+B for Polynomials （25 分）This time, you are supposed to find A+B where A and B are two polynomials.Input Specification:Each input file contains one test case. Each case occupies 2 lines, a...