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"NOI2017" Game 2-sat algorithm

Source: Internet
Author: User
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"Title" Libreoj

"Test Instructions" N games, there are three kinds of vehicles ABC, given the length of the string of N, ' a ' means not to choose a, ' B ' C ' in the same way, ' X ' means unlimited, at most d ' x '. There is a M-limit (I,HI,J,HJ) indicating that if the I field chooses the car hi, then the first field J must select the vehicle HJ. Solution, or no solution. N<=10^5,d<=8.

"Algorithm" 2-sat

Exercises

"NOI2017" Game 2-sat algorithm

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Related Keywords:
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