Personal solutions for LeetCode problems.
Problems are categorized by type (Algorithms and Database), study plan or Difficulty, and problem link is in each problem's readme file. In each problem, multiple languages are used to solve it, while in each language solution file, multiple solutions implemented by different techniques may be included.
Using Java, Python3, C# and Javascript to solve in each problem, with readme file to compare the running time and memory for these languages and different techniques.
Using Oracle SQL, MySQL, Microsoft SQL Server to solve in each problem, with readme file to compare the running time for these languages and different techniques.
The running time and memory vary because of machine used and account subscription, so I just use it to compare the difference among languages.