Something like leetcode is the perfect platform for this kind of data; crowdsourced submissions for each language, with automated I/O systems to verify accuracy

Something like leetcode is the perfect platform for this kind of data; crowdsourced submissions for each language, with automated I/O systems to verify accuracy. In fact, when you submit a solution to a given problem, it tells you your completion time and memory usage percentile relative to other submissions in that language. It'd be very cool if they published statistics for each problem, for each language, but I'm not seeing that data right now.