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摘要： Reversible Primes 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 阅读全文

摘要： Waiting in Line Suppose a bank has N windows open for service. There is a yellow line in front of the windows which devides the waiting area into two 阅读全文

摘要： Battle Over Cities 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 阅读全文

摘要： The Best Rank To evaluate the performance of our first year CS majored students, we consider their grades of three courses only: C - C Programming Lan 阅读全文

摘要： Radix 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 11 阅读全文

摘要： 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 阅读全文

摘要： 免费馅饼 都说天上不会掉馅饼，但有一天gameboy正走在回家的小径上，忽然天上掉下大把大把的馅饼。说来gameboy的人品实在是太好了，这馅饼别处都不掉，就掉落在他身旁的10米范围内。馅饼如果掉在了地上当然就不能吃了，所以gameboy马上卸下身上的背包去接。但由于小径两侧都不能站人，所以他只能在 阅读全文

摘要： Doing Homework Ignatius has just come back school from the 30th ACM/ICPC. Now he has a lot of homework to do. Every teacher gives him a deadline of ha 阅读全文

摘要： Ignatius and the Princess IV "OK, you are not too bad, em... But you can never pass the next test." feng5166 says. "I will tell you an odd number N, a 阅读全文

摘要： 非常可乐 大家一定觉的运动以后喝可乐是一件很惬意的事情，但是seeyou却不这么认为。因为每次当seeyou买了可乐以后，阿牛就要求和seeyou一起分享这一瓶可乐，而且一定要喝的和seeyou一样多。但seeyou的手中只有两个杯子，它们的容量分别是N 毫升和M 毫升 可乐的体积为S （S<101 阅读全文