Hi, I recently got myself registered on BZOJ. I am new to it and I had a few questions. 1. Is there something like they don't test our code on all the test cases. 2. What is the thing with the offline versions of their problems. What is it all about. 3. I have seen many people recommending doing same question from some diffrent OJ like Cogs or Luogu. Why is it so? 4. Why are they moving their website. What was the issue with the earlier one.