摘要：
Clay BullyTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 7342 Accepted: 4097DescriptionMs. Terry is a pre-school art teacher who likes to have her students work with clay. One of her assignments is to form a lump of clay into a block and then measure the dimensions of the block. However, 阅读全文
摘要：
Perfect CubesTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 10540 Accepted: 5658DescriptionFor hundreds of years Fermat's Last Theorem, which stated simply that for n > 2 there exist no integers a, b, c > 1 such that a^n = b^n + c^n, has remained elusively unproven. (A recent pr 阅读全文
摘要：
PerfectionTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 8519 Accepted: 4086DescriptionFrom the article Number Theory in the 1994 Microsoft Encarta: ``If a, b, c are integers such that a = bc, a is called a multiple of b or of c, and b or c is called a divisor or factor of a. If c is not 阅读全文
摘要：
Digital RootsTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 22313 Accepted: 7329DescriptionThe digital root of a positive integer is found by summing the digits of the integer. If the resulting value is a single digit then that digit is the digital root. If the resulting value contains tw 阅读全文
摘要：
u Calculate eTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 14442 Accepted: 8745 Special JudgeDescriptionA simple mathematical formula for e ise=Σ0<=i<=n1/i!where n is allowed to go to infinity. This can actually yield very accurate approximations of e using relatively small values 阅读全文
摘要：
Glass BeadsTime Limit: 3000MS Memory Limit: 10000KTotal Submissions: 1455 Accepted: 837DescriptionOnce upon a time there was a famous actress. As you may expect, she played mostly Antique Comedies most of all. All the people loved her. But she was not interested in the crowds. Her big hobby were bea 阅读全文
摘要：
Adding Reversed NumbersTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 11241 Accepted: 6232DescriptionThe Antique Comedians of Malidinesia prefer comedies to tragedies. Unfortunately, most of the ancient plays are tragedies. Therefore the dramatic advisor of ACM has decided to transfigure 阅读全文
摘要：
Integer InquiryTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 22014 Accepted: 8600DescriptionOne of the first users of BIT's new supercomputer was Chip Diller. He extended his exploration of powers of 3 to go from 0 to 333 and he explored taking various sums of those numbers. ``This s 阅读全文
摘要：
Word IndexTime Limit: 1000MSMemory Limit:10000KTotal Submissions: 3586Accepted:2030DescriptionEncoding schemes are often used in situations requiring encryption or information storage/transmission economy. Here, we develop a simple encoding scheme that encodes particular types of words with five or 阅读全文
摘要：
Machined SurfacesTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 1636 Accepted: 1088DescriptionAn imaging device furnishes digital images of two machined surfaces that eventually will be assembled in contact with each other. The roughness of this final contact is to be estimated. A digital 阅读全文
摘要：
TEX QuotesTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 6741 Accepted: 3546DescriptionTEX is a typesetting language developed by Donald Knuth. It takes source text together with a few typesetting instructions and produces, one hopes, a beautiful document. Beautiful documents use double-l 阅读全文
摘要：
Blowing FusesTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 2584 Accepted: 1029DescriptionMaybe you are familiar with the following situation. You have plugged in a lot of electrical devices, such as toasters, refrigerators, microwave ovens, computers, stereos, etc, and have them all runn 阅读全文
摘要：
Box of BricksTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 12823 Accepted: 5441DescriptionLittle Bob likes playing with his box of bricks. He puts the bricks one upon another and builds stacks of different height. "Look, I've built a wall!", he tells his older sister Alice. 阅读全文
摘要：
Common SubsequenceTime Limit: 1000MSMemory Limit:10000KTotal Submissions: 26378Accepted:10221DescriptionA subsequence of a given sequence is the given sequence with some elements (possible none) left out. Given a sequence X = < x1, x2, ..., xm > another sequence Z = < z1, z2, ..., zk > i 阅读全文
摘要：
Crazy tea partyTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 6220 Accepted: 4180Descriptionn participants of << crazy tea party >> sit around the table. Each minute one pair of neighbors can change their places. Find the minimum time (in minutes) required for all participants 阅读全文