摘要: gcd(n,n+1)=1 https://codeforces.com/problemset/problem/1521/B s.find() https://codeforces.com/problemset/problem/1845/C 做题反思:对于 \(s.find()\) 函数,前面为字符, 阅读全文
posted @ 2026-04-23 21:40 Lambda_L 阅读(12) 评论(0) 推荐(0)