摘要:
题目链接:http://poj.org/problem?id=3169 Description Like everyone else, cows like to stand close to their friends when queuing for feed. FJ has N (2 <= N 阅读全文
摘要:
题目链接:http://poj.org/problem?id=2502 Description You have just moved from a quiet Waterloo neighbourhood to a big, noisy city. Instead of getting to ri 阅读全文