摘要：
Navigation Nightmare 题目链接：virtual judge poj Farmer John's pastoral neighborhood has N farms (2 <= N <= 40,000), usually numbered/labeled 1..N. A serie 阅读全文
摘要：
Parity game Now and then you play the following game with your friend. Your friend writes down a sequence consisting of zeroes and ones. You choose a 阅读全文