Open EndSaH opened 5 years ago
https://endsah.cf/blog/NOIP2015-%E8%BF%90%E8%BE%93%E8%AE%A1%E5%88%92/
Description$$1 \le n, m \le 3 \times 10 ^5$$
https://endsah.cf/blog/NOIP2015-%E8%BF%90%E8%BE%93%E8%AE%A1%E5%88%92/
Description$$1 \le n, m \le 3 \times 10 ^5$$