Bags
PANDACU: second hand luxury bag and wallet bags designer used leather branded bags wholesale
PANDACU is a reputable wholesale supplier specializing in second-hand luxury bags and wallets. They offer a wide selection of designer used leather ba ......
F. Bags with Balls 第二类斯特林数
[Bags with Balls](https://codeforces.com/contest/1716/problem/F) 标号为奇数的个数为$c=\frac{m+1}{2}$ 标号为偶数个数为$w=m-c$ 答案显然为$ANS=\sum_{i=1}^{n}C(n,i)c^iw^{n-i}i^ ......
[ABC303G] Bags Game 解题分析
### 1 题目大意 **1.1 题目翻译** 有两个人轮流取物品。总共有 $n$ 个物品,第 $i$ 个物品的价值为 $w_i$。 他们按照下面的其中一种方式取物品: * 取出这一排物品最前面的或者最后面的。这一步没有代价。 * 设还剩下 $m$ 个物品,那么重复取出 $\min(B, m)$ 个 ......