摘要： B. New Problemtime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputComing up with a new problem isn't as easy as many people think. Sometimes it is hard enough to name it. We'll consider a title original if it doesn't occur as a substring 阅读全文

摘要： D. Little Girl and Maximum XORtime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputA little girl loves problems on bitwise operations very much. Here's one of them.You are given two integers l and r. Let's consider the values of for all pairs 阅读全文