摘要：
E - Flag 2Crawling in process...Crawling failedTime Limit:2000MS Memory Limit:131072KB64bit IO Format:%I64d & %I64uSubmitStatusPracticeCodeForces 18EDescriptionAccording to a new ISO standard, a flag of every country should have, strangely enough, a chequered fieldn × m, each square should 阅读全文
摘要：
D - Seller BobCrawling in process...Crawling failedTime Limit:2000MS Memory Limit:131072KB64bit IO Format:%I64d & %I64uSubmitStatusPracticeCodeForces 18DDescriptionLast year Bob earned by selling memory sticks. During each of n days of his work one of the two following events took place: A custo 阅读全文