[C++]Output problem

Question

I made a c++ program on my laptop.The only two possible outputs are “YES” and no.But when I run it on a website(not SoloLearn),I found that it outputs either “Yes” or “No”.This is just my homework on my c++ lesson.Because of this,I got 0 point on this question.What are the possible factors causing this problem?
https://code.sololearn.com/cwLxmwktQG9Z/?ref=app

Answer 1

maybe the website you're using automatically converts output to lowercase, only plausible explanation