p9238专题

P9238 [蓝桥杯 2023 省 A] 翻转硬币(杜教筛+莫比乌斯)

题目:https://www.luogu.com.cn/problem/P9238 思路: 代码: #define _CRT_SECURE_NO_WARNINGS #include<iostream> #include<string> #include<cstring> #include<cmath> #include<ctime> #include<algorithm> #include<