COMC 2018 C4

Question C4 on the Canadian Open Math Contest paper from 2018

You can find a copy of this contest here: https://cms.math.ca/Competitions/COMC/examarchive/comc2018-exam-en.pdf

For more Canadian contests and their solutions visit: https://cms.math.ca/Competitions/

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Видео COMC 2018 C4 канала Root Beer