david
UID: 3299, 注册于 2025-12-21 11:45:34, 最后登录于 2025-12-22 12:05:29, 目前离线.
解决了 25 道题目，RP: 110.38 (No. 421)
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个人简介
该用户太懒，这里啥也没写 (´・ω・｀) -
通过的题目
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最近活动
This person is lazy and didn't join any contests or homework. -
最近编写的题解
This person is lazy and didn't write any solutions.
题目标签
- 组合数学
- 13
- catalan数
- 1
- stirling数
- 1