1. Home
  2. Problem Set
  3. Training
  4. Contest
  5. Homework
  6. Discussion
  7. Record
  8. Ranking
  1. Login
  2. Language
    1. English
    2. 한국어
    3. 简体中文
    4. 正體中文

0 solutions

排列计数

  1. View Problem
  2. Login to Submit
  3. Discussions
  4. Solutions
  5. Files
  6. Statistics

Information

ID
4811
Time
500ms
Memory
125MiB
Difficulty
8
Tags
  • 动态规划,dp
  • 组合数学
  • 斯特林数,Stirling
  • 生成函数,GF
  • 快速傅里叶变换 FFT
  • 快速数论变换 NTT
# Submissions
0
Accepted
0
Uploaded By
Hydro

Status

  • Judging Queue
  • Service Status

Development

  • Open Source

Support

  • Help
  • Contact Us

About

  • About
  • Privacy
  • Terms of Service
  • Copyright Complaint
  1. Language
    1. English
    2. 한국어
    3. 简体中文
    4. 正體中文
  2. Legacy mode
  3. Theme
    1. Light
    2. Dark
  1. 粤ICP备2021104657号
  2. Worker 0, 8ms
  3. Powered by Hydro v5.0.0-beta.13 Community
CLOSE

SIGN IN

Using your HFOJ universal account

Forgot password or username?