文章目录 Bell数和Bell多项式第二类Bell多项式 Bell数和Bell多项式
Bell,即所有包含 n n n个对象的有限集合的子集数之和,可通过递推式进行定义 B n ∑ k 0 n − 1 ( n − 1 k ) B k , B 0 1 B_n\sum^{n-1}_{k0}\begin{pmatrix} n-1\\k \end{pmatrix…
368. Largest Divisible Subset
难度:Medium
动态规划 方案还原 Yesterdays Daily Challenge can be reduced to the problem of shortest path in an unweighted graph while todays daily challenge can be reduced to the problem of longest path in an unwe…
这场比较郁闷,C题短路,连续4次WA,导致罚时太多 A - Arithmetic Progression
Problem Statement
Print an arithmetic sequence with first term A A A, last term B B B, and common difference D D D. You are only given inputs for w…