摘要：
An equal sum partition of a sequence of numbers is a grouping of the numbers (in the same order as the original sequence) in such a way that each grou 阅读全文
摘要：
George took sticks of the same length and cut them randomly until all parts became at most 50 units long. Now he wants to return sticks to the origina 阅读全文
摘要：
Using each of the digits 1, 2, 3,...,D1 exactly once to form D1 digit numbers, how many are divisible by D2. 输入 The input data will contain multiple c 阅读全文