Meta Software Engineering - New Grad interview questions

I was selected for an on-campus screening interview. The interview was pretty easy compared to other companies. After the initial ice breakers, was asked an open ended question related to area of my interest followed by 2 coding questions to be solved on a paper. Basic questions testing if you can write code and know data structures. Was informed in a couple of hours that I am selected for on-site interview. The process to select the dates and flights, hotels was smooth. There were about 30-40 other new grad candidates and intern on the day of interview. Every new grad had just 3 coding interviews one of which was behavioral interview for checking if the candidate would be a good fit. The other two were ninja coding interviews. I had two coding questions in the behavioral round which I answered well. Two question in the first ninja round which were pretty wasy and I coded pretty quickly but messed up a basic thing in the first question. Had time for only one question in the second ninja round. This was the only tougher question in the interviews and I got the ideal answer in the end but didn't have time to finish the coding part. I think the basic mistake in the second interview and the third interview messed up my chances. I feel the company puts importance on how fast you come up with perfect answer. That's the questions are simple. So you are expected to be quick thinking and are expected to not mess up something so simple. There was lunch, awesome tour of campus and two tech talk after the interviews. This was one of the best interview days I had this season (I have had 4 on-site interview till now). No all day long torture of interviews and pretty awesome talks and tour giving an inside view of the company. Would interview again if given a chance!