摘要：
Time Limit: 10 Sec Memory Limit: 128 MBSubmit: 1487 Solved: 1002[Submit][Status][Discuss] Description 某公司估计市场在第i个月对某产品的需求量为Ui，已知在第i月该产品的订货单价为di，上个月月底未 阅读全文
摘要：
Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well 阅读全文