摘要：
Problem DescriptionDuring summer vacation,Alice stay at home for a long time, with nothing to do. She went out and bought m pokers, tending to play po... 阅读全文
摘要：
Problem DescriptionRecently, Peter likes to measure the humidity of leaves. He recorded a leaf humidity every day. There are four types of leaves wetn... 阅读全文
摘要：
Problem DescriptionToday the company has m tasks to complete. The ith task need xi minutes to complete. Meanwhile, this task has a difficulty level yi... 阅读全文