摘要：Chiaki has n intervals and the i-th of them is [li, ri]. She wants to delete some intervals so that there does not exist three intervals a, b and c su 阅读全文

摘要：This is a very easy problem. ACMeow loves GTX1920. Now he has m RMB, but no GTX1920s. In the next n days, the unit price of GTX1920 in the ith day is 阅读全文

摘要：You have m = n·k wooden staves. The i-th stave has length ai. You have to assemble nbarrels consisting of k staves each, you can use any k staves to c 阅读全文

摘要：Nura wants to buy k gadgets. She has only sburles for that. She can buy each gadget for dollars or for pounds. So each gadget is selling only for some 阅读全文