摘要：
A thief made his way to a shop.As usual he has his lucky knapsack with him. The knapsack can contain k objects. There are n kinds of p... 阅读全文
摘要：
You are given array a with n elements and the number m. Consider some subsequence of a and the value of least common multiple (LCM) of... 阅读全文
摘要：
You're given a list of n strings a1, a2, ..., an. You'd like to concatenate them together in some order such that the resulting string... 阅读全文