return arr.reduce(arr.begin(), arr.end(), max);

Hi, Thank you for sharing your interview experience. As a small team of ex-Google employees, we have recently launched interviewjoy.com, a career consultancy community, where users can buy/sell services that provide job interview experiences/insights. We have some very popular services about Amazon job interviews! Posting an interview consultancy service is totally free & anonymous. You can also create a service in 2 minutes and earn money by sharing your experience with other candidates over the phone or via a document you created. Users already started making money on the website by sharing their experiences. You are kindly invited to interviewjoy.com to check it out. Thanks!