[P1638](https://www.luogu.com.cn/problem/P1638)（黄题）加个离散化=[蓝题](https://www.luogu.com.cn/problem/P3029)？
by TDoG_W @ 2023-05-14 10:21:48
话说1 billion 还不够明显(离散化)？
by Zipao @ 2023-09-18 21:56:20