Blake2s mining algorithm

1. Hashlib you. And then tab where the algorithm appeared, the most commonly used is MD5 ()

2. First of all, it must be the former. I simply divided the four people into a, B, C and D. AB passed together first, and a took back the flashlight for three minutes; CD together, B take back the flashlight, a total of 10 minutes; It takes 2 minutes to pass the test again; 15 min in total. Hope to adopt~