As a Codechef coder Myself and observing this issue with other students, I want to suggest codeshef community that whenever even a single testcase failed to pass , so the compiler can give student information about the error on that testcase while compiling. I know this can make the student lazy so listen to next idea , The compiler will show the error only after a specific amount of modification and submission of code , this will not only engage the student for finding their mistake but also help in realizing it on the spot , many times student run their code in different IDE and that gives the correct output so the student stop engaging with the question and thinking that their might be problem with the compiler but that is not the case.
This idea is common but as growing users in Online Coding platforms one has to think about what new we can give to their usesers.
Thank you!