摘要：
There are nn players sitting at the card table. Each player has a favorite number. The favorite number of the jj-th player is fjfj. There are k⋅nk⋅n c 阅读全文
摘要：
There are nn cities and mm roads in Berland. Each road connects a pair of cities. The roads in Berland are one-way. What is the minimum number of new 阅读全文
摘要：
Problem Statement AtCoDeer the deer is seeing a quick report of election results on TV. Two candidates are standing for the election: Takahashi and Ao 阅读全文