If you ever used AtCoder, you should know about its many features. One of the features is running your program on all of the testcases and then displaying how much WA's, how many AC's, how many RE's, etc. I think that this feature should be implemented in Codeforces. You can have the option to turn it on or turn it off.

Why Would I Want It

I recently saw Errichto use this feature of AtCoder to check if his thought process is right before trying to optimize the code. I think that he was trying to do Problem E from AtCoder Grand Contest 48. I also believe that many people like Errichto would also want to see if their thought process is right before continuing on to optimize the code.

Please share your thoughts in the comments below.