摘要：题面描述 Ratish is a young man who always dreams of being a hero. One day his friend Luffy was caught by Pirate Arlong. Ratish set off at once to Arlong's 阅读全文

摘要：Description David the Great has just become the king of a desert country. To win the respect of his people, he decided to build channels all over his 阅读全文

摘要：Description Consider a single-elimination football tournament involving 2n teams, denoted 1, 2, …, 2n. In each round of the tournament, all teams stil 阅读全文

摘要：Description In a certain course, you take n tests. If you get ai out of bi questions correct on test i, your cumulative average is defined to be . Giv 阅读全文