摘要：
Problem description: To brighten up the gala dinner of the IOI'98 we have a set of N coloured lamps numbered from 1 to N. The lamps are connected to f 阅读全文
摘要：
滑雪 Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 113903 Accepted: 43478 Description Michael喜欢滑雪百这并不奇怪， 因为滑雪的确很刺激。可是为了获得速度，滑的区域必须向下倾斜，而且当你 阅读全文