Hello Codeforces! I wanted to request something from the codeforces community. To start i need to give some introduction : I couldn't participate in a contest in a time and i just thought of trying to be a tester for the first time then i messaged Hamed_Ghaffari,The writer of Codeforces Round 1124 (Div. 1) and Codeforces Round 1124 (Div. 2) that i want the permission to test and he said ok and give me the access without saying anything else. Then i said something very little that i can say it had an epsilon value of effect on the contest and i didn't say anything else. And after some hours i noticed the big mistake i've taken and i tried to fix it. Then i told the story to my new teacher Arpa and he said you first should read some rules and accept them to become a tester and testers were just some special people and the contest writers couldn't invite anyone as testers and some of them even had salary. I want to say that, No one ever told me that we have something like this about testing which for example someone agree with it and then be a tester? and i was looking all of the codeforces and didn't see any blog about this so i decided to write my own. If someone knows the rules i'll be happy if he writes in comments.