San Marcos全美第二大的outlet真的不是盖的。所幸前一天没连夜赶往San Marcos去抢货，Bestbuy想必也会出现流血事件吧……
About Project Euler:
For this programming project, I do not have much to say, because it is really hard, especially for those NP problems. Anyway, I learned an open source software: SAGE, which integrates PARI/GP and Python, GAP languages, I am sure there will be a promising future for this software. At least, I have tried some problems from Project Euler, and the answers were output in less than 0.1ms mostly, better than those so-called optimization. And I would like share the code with everybody, maybe another day.