- [F - 01 on Tree](https://atcoder.jp/contests/agc023/tasks/agc023_f) - [G - Treasure Hunting](https://atcoder.jp/contests/abc376/tasks/abc376_g) - [解説 - AtCoder Beginner Contest 376（Promotion of AtCoder Career Design DAY）](https://atcoder.jp/contests/abc376/editorial/11196) - [01 on Tree / 京都観光 / Train Seats | maspyのHP](https://maspypy.com/01-on-tree-%E4%BA%AC%E9%83%BD%E8%A6%B3%E5%85%89-train-seats) - [O - Ordinary Blossom Algorithm](https://atcoder.jp/contests/kupc2024/tasks/kupc2024_o) - [解説 - KUPC 2024](https://atcoder.jp/contests/kupc2024/editorial/11604) - https://yukicoder.me/problems/no/3148
