S__ph的博客

一、题目描述链接(ACwing)：https://www.acwing.com/problem/content/146/链接(POJ)：http://poj.org/problem?id=3764Problem Description：In an edge-weighted tree, the xor-length of a path p is defined as the xor sum of the weights of edges on p:⊕ is the xor operator.W

一、题目描述链接：http://acm.hdu.edu.cn/showproblem.php?pid=7101Problem Description：Time-division multiplexing (TDM) is a method of transmitting and receiving independent signals over a common signal path by means of synchronized switches at each end of the tran