Open EndSaH opened 5 years ago
https://endsah.cf/blog/JLOI2015-%E9%AA%97%E6%88%91%E5%91%A2/
Description$$1 \le m, n \le 10 ^6$$
https://endsah.cf/blog/JLOI2015-%E9%AA%97%E6%88%91%E5%91%A2/
Description$$1 \le m, n \le 10 ^6$$