欢迎广大网友做题!
水仙花数:https://www.luogu.com.cn/problem/U467199
同构数:https://www.luogu.com.cn/problem/U467184
完美数:https://www.luogu.com.cn/problem/U467179
奇偶数问题:https://www.luogu.com.cn/problem/U467178