ONI 2012 V (#615) 3 problems

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ONI 2012 VI (#614) 3 problems

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ONI 2012 VII (#613) 3 problems

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ONI 2012 VIII (#612) 3 problems

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ONI 2012 IX (#616) 6 problems

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ONI 2012 X (#611) 6 problems

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ONI 2012 XI-XII (#31) 6 problems

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ONI 2012 Baraj Juniori (#485) 3 problems

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ONI 2012 Baraj Seniori (#119) 3 problems

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