What is the best way to collect information for particular test? Time/100ms (if there is window for that), memory/100kB, WA, TLE, RE... what else? What maximum number of bits per try? Let's call it `bitrate`. Serious enough term for further discussion =), isn't it?
How to match particular test? Binary search for hash value of the input?
Please, reveal your super-duper technology with your fancy-nancy metrics.