Open EndSaH opened 5 years ago
https://endsah.cf/blog/CF1017G-The-Tree/
Description $$1 \le n, m \le 2 \times 10 ^5$$
https://endsah.cf/blog/CF1017G-The-Tree/
Description $$1 \le n, m \le 2 \times 10 ^5$$