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These scars long have yearned for your tender cares.

想起在知乎翻到的问题[读书早晚会忘，为什么还要读书？

Reverse a singly linked list.

Mary is a teacher in a middle school and she has a table seat storing students' names and their corresponding seat ids.

Write a SQL query to get the second highest salary from the Employee table.

Given a Weather table, write a SQL query to find all dates' Ids with higher temperature compared to its previous (yesterday's) dates.

transmission.

晏叔原，临淄公之暮子也。

To establish a connection, TCP uses a three-way handshake.