摘要： Problem DescriptionIn ACM_DIY, there is one master called “Lost”. As we know he is a “-2Dai”, which means he has a lot of money.Well, Lost use Ipad an... 阅读全文

摘要： DescriptionLittle Y finds there is a very interesting formula in mathematics:XY mod Z = KGiven X, Y, Z, we all know how to figure out K fast. However,... 阅读全文

摘要： Problem DescriptionThe picture indicates a tree, every node has 2 children.The depth of the nodes whose color is blue is 3; the depth of the node whos... 阅读全文