摘要：
题目链接： "POJ 3264" Problem Description For the daily milking, Farmer John's $N$ cows $(1 \le N \le 50,000)$ always line up in the same order. One day Fa 阅读全文
摘要：
题目链接： "HDU 5443" Problem Description In Land waterless, water is a very limited resource. People always fight for the biggest source of water. Given a 阅读全文