杂题选做 Part 4. dp

dp 太烂了，加练。 [Part 1.](https://www.luogu.com.cn/training/499842) [Part 2.](https://www.luogu.com.cn/training/518105) [Part 3.](https://www.luogu.com.cn/training/597433) [数数数](https://www.luogu.com.cn/training/627660) [交互、构造、博弈](https://www.luogu.com.cn/training/676672) [CF76F](https://www.luogu.com.cn/article/vie62xr9) 题解。 [CF331C2/CF331C3](https://www.luogu.com.cn/article/yi3salgh) 题解。 [CF567F](https://www.luogu.com.cn/article/0ssjeln1) 题解。 [CF1798F](https://www.luogu.com.cn/article/m7c8zfx8) 题解。 [CF2021D](https://www.luogu.com.cn/article/dgiwhgag) 题解。 [CF757E](https://www.luogu.com.cn/article/11wid6in) 题解。 [CF238C](https://www.luogu.com.cn/article/suvypx0f) 题解。 [CF542D](https://www.luogu.com.cn/article/xxvcthva) 题解。 [AT agc012 e](https://www.luogu.com.cn/article/df04z464) 题解。