https://www.luogu.org/problem/show?pid=2347 求方案种类的
https://www.vijos.org/p/1334 二维费用背包
https://www.luogu.org/problemnew/show/1833 两个背包
https://www.luogu.org/problem/show?pid=1137#sub
https://www.luogu.org/problemnew/show/1734 需要转化的dp
https://www.luogu.org/problemnew/show/2733
https://www.luogu.org/problemnew/show/1282一道较难的dp
未过：