摘要:
A pretty girl in a white dress一个穿着婚纱的少女And a ring of gold和一个婚戒的故事Everything I wrote down我逐一写下It’s time for me to let you know是时候让你知道I’ll be standing r 阅读全文
摘要:
原博客:https://blog.csdn.net/zxwsbg/article/details/81488956 φ(n)=n*(1-1/p1)*(1-1/p2)*(1-1/p3)*(1-1/p4)…..(1-1/pn),其中pi为n的质因数 方法1:求单个数的欧拉函数 1 long long e 阅读全文
摘要:
[Poi2011]Dynamite 题目描述 The Byteotian Cave is composed of n chambers and n-1 corridors that connect them. For every pair of chambers there is unique wa 阅读全文