三水的鱼塘♂

1001 A+B Format （20 分）Calculate a+b and output the sum in standard format -- that is, the digits must be separated into groups of three by commas (unless there are less than four digits).Input Spe...

1100 Mars Numbers （20 分）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, may, jun, jly, aug, sep...

1084 Broken Keyboard （20 分）On a broken keyboard, some of the keys are worn out. So when you type some sentences, the characters corresponding to those keys will not appear on screen.Now given a st...

1077 Kuchiguse （20 分）The Japanese language is notorious for its sentence ending particles. Personal preference of such particles can be considered as a reflection of the speaker's personality. Such ...

1069 The Black Hole of Numbers （20 分）For any 4-digit integer except the ones with all the digits being the same, if we sort the digits in non-increasing order first, and then in non-decreasing order...

1017 Queueing at Bank （25 分）Suppose a bank has K windows open for service. There is a yellow line in front of the windows which devides the waiting area into two parts. All the customers have to wai...

1015 Reversible Primes （20 分）A reversible prime in 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...

1013 Battle Over Cities （25 分）It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We...

1012 The Best Rank （25 分）To evaluate the performance of our first year CS majored students, we consider their grades of three courses only: C - C Programming Language, M - Mathematics (Calculus or L...

1011 World Cup Betting （20 分）With the 2010 FIFA World Cup running, football fans the world over were becoming increasingly excited as the best players from the best teams doing battles for the World...

1010 Radix （25 分）Given a pair of positive integers, for example, 6 and 110, can this equation 6 = 110 be true? The answer is yes, if 6 is a decimal number and 110 is a binary number.Now for any pa...

1009 Product of 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...

1008 Elevator （20 分）The highest building in our city has only one elevator. A request list is made up with N positive numbers. The numbers denote at which floors the elevator will stop, in specified...

1007 Maximum Subsequence Sum （25 分）Given a sequence of K integers { N​1​​, N​2​​, ..., N​K​​ }. A continuous subsequence is defined to be { N​i​​, N​i+1​​, ..., N​j​​ } where 1≤i≤j≤K. The Maximum Su...

1006 Sign In and Sign Out （25 分）At the beginning of every day, the first person who signs in the computer room will unlock the door, and the last one who signs out will lock the door. Given the reco...

1005 Spell It Right （20 分）Given a non-negative integer N, your task is to compute the sum of all the digits of N, and output every digit of the sum in English.Input Specification:Each input file...

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...

1016 Phone Bills （25 分）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 wh...