Enumerative Combinatorics
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组合计数与特殊函数
- Factorial
- Many Factorials
- Montmort Number
- Bell Number
- Binomial Coefficient
- Binomial Coefficient (Prime Mod)
- q-Binomial Coefficient (Prime Mod)
- Partition Function
- Stirling Number of the First Kind
- Stirling Number of the First Kind (Fixed K)
- Stirling Number of the Second Kind
- Stirling Number of the Second Kind (Fixed K)
- Stirling Number of the First Kind (Small p, Large n)
- Stirling Number of the Second Kind (Small p, Large n)
章节 1. 组合计数与特殊函数
开放
| 题目 | 尝试 | AC | 难度 |
|---|---|---|---|
| P3681 阶乘（Factorial） | 5 | 1 | 10 |
| P3682 多阶乘（Many Factorials） | 1 | 1 | 10 |
| P3683 蒙特莫特数（Montmort Number） | 1 | 1 | 10 |
| P3684 贝尔数（Bell Number） | 1 | 1 | 10 |
| P3686 二项式系数（Binomial Coefficient） | 1 | 1 | 10 |
| P3687 二项式系数（质模）（Binomial Coefficient (Prime Mod)） | 1 | 1 | 10 |
| P3688 q-二项式系数（质模）（q-Binomial Coefficient (Prime Mod)） | 1 | 1 | 10 |
| P3689 划分数（Partition Function） | 1 | 1 | 10 |
| P3691 Stirling Number of the First Kind | 1 | 1 | 10 |
| P3692 Stirling Number of the First Kind (Fixed K) | 5 | 1 | 10 |
| P3693 Stirling Number of the Second Kind | 1 | 1 | 10 |
| P3694 Stirling Number of the Second Kind (Fixed K) | 2 | 1 | 10 |
| P3695 Stirling Number of the First Kind (Small p, Large n) | 1 | 1 | 10 |
| P3696 Stirling Number of the Second Kind (Small p, Large n) | 1 | 1 | 10 |
| P3697 #p Subset Sum | 1 | 1 | 10 |
| P3698 Number of Subsequences | 1 | 1 | 10 |
| P3699 Number of Increasing Sequences Between Two Sequences | 1 | 1 | 10 |