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B - Xor SumTime Limit:1000MS Memory Limit:132768KB 64bit IO Format:%I64d & %I64u Zeus 和 Prometheus 做了一个游戏，Prometheus 给 Zeus 一个集合，集合中包含了N个正整数，随后 Prometheus 将向 Zeus 发起M次询问，每次询问中包含一个正整数 S ，之后 Zeu...

Problem Description John is a manager of a CPU chip factory, the factory produces lots of chips everyday. To manage large amounts of products, every processor has a serial number. More specifically, ...

Memphis loves xor very musch.Now he gets an array A.The length of A is n.Now he wants to know the sum of all (lowbit(AiAi xor AjAj)) (i,j∈[1,n])(i,j∈[1,n]) We define that lowbit(x)=2k2k,k is the smal...

Today at the lesson Vitya learned a very interesting function — mex. Mex of a sequence of numbers is the minimum non-negative number that is not present in the sequence as element. For example, mex([4...

题目链接：https://ac.nowcoder.com/acm/contest/342/C题目：筱玛是个快乐的男孩子。寒假终于到了，筱玛决定请他的朋友们一起来玩迷阵探险。迷阵可以看做一个n×n的矩阵A，每个格子上有一个数Ai,j。入口在左上角的(1,1)处，出口在右下角的(n,n)处。每一步都只能向下或向右移动一格。最后能获得的经验值为初始经验e与路径上经过的所有数的权值异或和。求...