摘要:
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 . Given your test 阅读全文
摘要:
Farmer John has decided to reward his cows for their hard work by taking them on a tour of the big city! The cows must decide how best to spend their 阅读全文
摘要:
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 country to b 阅读全文