摘要:
[洛谷传送门](https://www.luogu.com.cn/problem/AT_arc133_e "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/arc133/tasks/arc133_e "AtCoder 传送门") 其实是套路题,但是 阅读全文
摘要:
[洛谷传送门](https://www.luogu.com.cn/problem/CF1832D2 "洛谷传送门") [CF 传送门](https://codeforces.com/contest/1832/problem/D2 "CF 传送门") 首先,如果一个点变成蓝色,在下一次立刻把它变成红色 阅读全文