I have an OK decision for the problem. I have MY decision for this problem. I need to compare them. If everything is alright, the service should return OK. If not - "Wrong Answer". I need to test my projects! It is very helpful and useful 
Help! Recommend me some website or some plug-in, or some app... The interface must be as pleasant and as simple as possible. P.S. This is my first English experiment
Help! Recommend me some website or some plug-in, or some app... The interface must be as pleasant and as simple as possible. P.S. This is my first English experiment