**If you can fix any of the issues or add new features, you're welcome to send the PR to us. If the PR is accepted, your contribution will be scored from 0 to 5 points according to the difficulty and quality (higher is better). If you get 10 points, you can contact us for interviewing opportunities or recommendation letter for your future jobs.**
**If you can fix any of the issues or add new features, you're welcome to send the PR to us. If the PR is accepted, your contribution will be scored from 0 to 5 points according to the difficulty and quality (higher is better). If you accumulate 10 points, you can contact us for interviewing opportunities or recommendation letter for your future jobs.**
Make sure your code meets following requirements before submitting the PR: