littledy

摘要： Problem : Given a linked list, return the node where the cycle begins. If there is no cycle, return . To represent a cycle in the given linked list, w 阅读全文

摘要： 异或性质 [1]： 交换律：A ^ B = B ^ A; 结合律：A ^ (B ^ C) = (A ^ B) ^ C; 恒等律：X ^ 0 = X; 归零律：X ^ X = 0; 自反：A ^ B ^ B = A ^ 0 = A; 对于任意的 X： X ^ ( 1) = ~X； 如果 A ^ B = 阅读全文