牛客小白月赛11 Rinne Loves Xor

题目链接：https://ac.nowcoder.com/acm/contest/370/I code: #include<bits/stdc++.h> using namespace std; typedef unsigned long long ll; ll mod=1e9+7; ll pow(ll x,ll n,ll mod) { ll res=1; while(n>0) {

>>阅读原文<<