有 n 个人，编号为 1 到 n。已知其中存在 m 对朋友关系，每对关系由两个编号 u 和 v 给出，表示 u 与 v 是朋友。 朋友关系是相互的，并且具有传递性：如果 A 与 B 是朋友，B 与 C 是朋友，那么 A 与 C 也属于同一个朋友圈。也就是说，只要两个人能通过若干条朋友 ...

如果一个字符串正着读和倒着读完全相同，则称它为回文串。给定一个只含小写字母的字符串 s，请求出 s 的最长回文子串。 子串是指 s 中一段连续字符组成的字符串。若长度最长的回文子串有多个，输出起始下标最小的那一个。字符串下标从 0 开始。 输入格式 ...

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NPTEL released the July-December 2026 semester results for various diploma programs. The NPTEL results have been released online on the official website of NPTEL- nptel.ac.in. Here we are also ...

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Overview:  Computer Science, AI, and Data Science offer distinct career paths, although they share several technical skills ...

This is how Nicolai Klemke dropped his PhD in physics to build in AI, and now makes $100K per month.Serious about B2B?