You should try leetcode since it helps you to understand better the language, learn new algorithms and helps you building problem-solving skills.
| # | Problem | Language | Runtime |
|---|---|---|---|
| 1 | Two Sum | Elixir | Beats 18% |
| 2 | Add two numbers | Elixir | Beats 76% |
| 3 | Longest substring without repeating | Elixir | Beats 61% |
| 4 | Reverse Integer | Elixir | Beats 66% |
| 5 | String to integer | Elixir | Beats 50% |
| 6 | Integer to Roman | Elixir | Beats 57% |
| 535 | Encode and decode TinyURL | Javascript | Beats 53% |