Editorial for CTU Open Contest 2017 - Punching Power
Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.
Submitting an official solution before solving the problem yourself is a bannable offence.
Submitting an official solution before solving the problem yourself is a bannable offence.
- Number of minimal erases = minimal match
- Minimal match can be solved for example by minimum flows
- Optimal
(but worse matching was allowed too)
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