摘要:
地址 http://poj.org/problem?id=2386 《挑战程序设计竞赛》习题 题目描述Description Due to recent rains, water has pooled in various places in Farmer John’s field, which i 阅读全文
摘要:
地址 http://poj.org/problem?id=1852 题目描述 Description An army of ants walk on a horizontal pole of length l cm, each with a constant speed of 1 cm/s. Whe 阅读全文