LeetCode is the best platform to help you enhance your skills, expand your knowledge and prepare for technical interviews.
I’ve been testing for a while and you can find many possibilities to test your programming skills and possibly see other solutions. Most of the presented programs are quite difficult and require quite a large consumption of time.
The coding environment provided on LeetCode supports C++, C#, C, Java, JavaScript, Python, Ruby, Go, Scala, Kotlin, Rust, PHP, TypeScript, Racket, Erlang, Elixir, and Dart.
You can find it on the official webpage.