4Sum

Problem Description

3Sum Closest

Problem Description

3Sum

Problem Description

Container With Most Water

Problem Description

Median of Two Sorted Arrays

Problem Description

Two Sum

Problem Description

Best Time to Buy and Sell Stock

Problem Description

Trapping Rain Water

Problem Description

Kth Smallest Element in a BST

Problem Description

Java 3 threads print in sequence

This is an interview question, the content of the question is like this.

Delete Node in a BST

Problem Description

Validate Binary Search Tree

Problem Description

Merge Sorted Array

Problem Description

SQL group by case example

Here's an interview question about SQL. To solve this problem, we need to use group by and the case function. The table structure is as follows.