Open EndSaH opened 4 years ago
https://endsah.tk/blog/CF708E-Student-s-Camp/#more
Description $$1 \le n, m \le 1500, 1 \le k \le 10 ^5$$ 答案对 $10 ^9 + 7$ 取模。
https://endsah.tk/blog/CF708E-Student-s-Camp/#more
Description $$1 \le n, m \le 1500, 1 \le k \le 10 ^5$$ 答案对 $10 ^9 + 7$ 取模。