摘要：
The cows are journeying north to Thunder Bay in Canada to gain cultural enrichment and enjoy a vacation on the sunny shores of Lake Superior. Bessie, ... 阅读全文
摘要：
A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use our secret weapon to eliminate the battleships. Ea... 阅读全文
摘要：
There is an integeraandnintegersb1,…,bn. After selecting some numbers fromb1,…,bnin any order, sayc1,…,cr, we want to make sure thatamodc1modc2mod…mod... 阅读全文
摘要：
You have two friends. You want to present each of them several positive integers. You want to presentcnt1numbers to the first friend andcnt2numbers to... 阅读全文