enspired interview questions

I had the first general interview and then they send me the code challenge, the test was interesting but unfortunately I didn't manage to achieve the desired results. They were fast to answer and friendly during the entire process.

Badmark! At the beginning, they said the first step, they assigned me some coding work to do. I finished the work and coding very quickly. Although my program runs very well and gives the correct results, they rejected me without any reason. It seems like I helped them finish a work for free.