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The best part of the day for Farmer John's cows is when the sun sets. They can see the skyline of the distant city. Bessie wonders how many buildings the city has. Write a program that assists the cow

AssignmentTime Limit : 4000/2000ms (Java/Other)   Memory Limit : 65536/65536K (Java/Other)Problem DescriptionTom owns a company and he is the boss. There are n staffs which are numbered from 1 to n in...

题目链接：http://codeforces.com/gym/101652/attachments题意：给出n，代表有n个数，现在进行如下操作：1.输出1，让1与2,3,4...n匹配产生数对（1,2），（1,3）...（1,n）2.输出2，让2与3,4,5...n匹配产生数对（2,3），（2,4）...（2,n）..........n-1.输出n-1，让n-1与n匹配产生数对（n-1,n）注意：...

题目链接：http://codeforces.com/gym/101778/problem/BCodeforces上的一篇题解：http://codeforces.com/blog/entry/58982题意：给出n和a，让找一个n个数的正整数集合使得这个集合中的元素累加和的平均值等于a，基于此求满足此条件的集合中互不相同的元素的个数最多是多少。解析：1.找集合a1,a2...an，且他们的和等于...

Problem DescriptionJGShining's kingdom consists of 2n(n is no more than 500,000) small cities which are located in two parallel lines.Half of these cities are rich in resource (we call them ri

今天做的题不多

Terrible SetsTime Limit : 2000/1000ms (Java/Other)   Memory Limit : 60000/30000K (Java/Other)Total Submission(s) : 29   Accepted Submission(s) : 16Problem DescriptionLet N be the set o

Problem DescriptionGiven a m-by-n (0,1)-matrix, of all its submatrices of all 1’s which is the largest? By largest we mean that the submatrix has the most elements. Input<p>The input contains multiple test cases. Each test case begins with <i>m</i> an

A histogram is a polygon composed of a sequence of rectangles aligned at a common base line. The rectangles have equal widths but may have different heights. For example, the figure on the left shows the histogram that consists of rectangles with the heigh

Feel Good Bill is developing a new mathematical theory for human emotions. His recent investigations are dedicated to studying how good or bad days influent people's memories about some period of life. A new idea Bill has recently developed assigns a n

Bad Hair DayTime Limit : 4000/2000ms (Java/Other)   Memory Limit : 131072/65536K (Java/Other)Total Submission(s) : 48   Accepted Submission(s) : 17Problem DescriptionSome of Farmer J

DryingTime Limit : 4000/2000ms (Java/Other)   Memory Limit : 131072/65536K (Java/Other)Total Submission(s) : 72   Accepted Submission(s) : 22Problem DescriptionIt is very hard to was

Copying BooksTime Limit : 6000/3000ms (Java/Other)   Memory Limit : 20000/10000K (Java/Other)Total Submission(s) : 60   Accepted Submission(s) : 24Problem DescriptionBefore the inventi

The sequence of n 1 consecutive composite numbers (positive integers that are not prime and not equal to 1) lying between two successive prime numbers p and p + nis called a prime gap of length n. For example, 24, 25, 26, 27, 28 between 23 and 29 is a prim

Monthly ExpenseTime Limit : 4000/2000ms (Java/Other)   Memory Limit : 131072/65536K (Java/Other)Total Submission(s) : 35   Accepted Submission(s) : 12Problem DescriptionFarmer John is an astounding ac...

Aggressive cowsTime Limit : 2000/1000ms (Java/Other)   Memory Limit : 131072/65536K (Java/Other)Total Submission(s) : 32   Accepted Submission(s) : 11Problem DescriptionFarmer John has

        目录   Problem A. Ascending Rating（HDU6319）    Problem D. Euler Function（HDU6322）    Problem F. Grab The Tree（HDU6324）                                  Problem A. Ascending Rating（HDU6319）...