摘要：
Revenge of Segment Tree Problem Description In computer science, a segment tree is a tree data structure for storing intervals, or segments. It allows 阅读全文
摘要：
A. Factory One industrial factory is reforming working plan. The director suggested to set a mythical detail production norm. If at the beginning of t 阅读全文
摘要：
B. Valuable Resources Many computer strategy games require building cities, recruiting army, conquering tribes, collecting resources. Sometimes it lea 阅读全文