AC source of uvalive 4849. Algorithms: 2-sat. Meaning of the questions: to n (n <= 3000) coordinates a black box, to ensure that there is no common edge black squares. For each black box to choose a corner as nodes, such that the selected nodes meet a directed graph with no input. Where the distance is the Manhattan distance. Output is solvable. possible or impossible.

UVALive4849.cpp

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．