Workday Data Science interview questions

I applied for the Data Scientist position in San Francisco. In the onsite interview, all of the interviewers are very nice, and showed respect, and I like the restaurant in the lunch with hiring manager very much. The interview question is difficult. Actually, as Data Scientist position, especially according to the description of the job post, I didn't expect that there is so difficult question about algorithm/programming. Because I signed the NDA, I can not say exactly question, but two code questions are both from leetcode, one is medium, and the other is difficult. I answered the medium one, and I am sure that the code is correct, but apparently it is not the best solution as expected by interviewer, and I failed the difficult one. And after that, the third interviewer (there are supposed to be five interviewers in total), asked me "how do you feel about the interview today?", I say "just so so". "yes, actually, I talked with the previous interviewers, that we decided that we won't proceed your interview. And we don't want to waste your time, so we can stop now."