ONI 2024 XI-XII (#1081) 3 problems

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ONI 2023 XI-XII (#194) 3 problems

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ONI 2022 XI-XII (#16) 3 problems

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ONI 2021 XI-XII (#4) 3 problems

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ONI 2019 XI-XII (#19) 6 problems

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ONI 2018 XI-XII (#20) 6 problems

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ONI 2017 XI-XII (#24) 6 problems

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ONI 2016 XI-XII (#27) 6 problems

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ONI 2015 XI-XII (#30) 6 problems

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ONI 2014 XI-XII (#36) 6 problems

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ONI 2013 XI-XII (#33) 6 problems

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ONI 2012 XI-XII (#31) 6 problems

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ONI 2011 XI-XII (#28) 6 problems

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ONI 2010 XI-XII (#26) 6 problems

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ONI 2009 XI-XII (#25) 6 problems

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ONI 2008 XI-XII (#23) 6 problems

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ONI 2007 XI-XII (#22) 6 problems

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ONI 2006 XI-XII (#13) 6 problems

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ONI 2005 XI-XII (#12) 6 problems

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ONI 2004 XI-XII (#11) 6 problems

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ONI 2003 XI-XII (#14) 6 problems

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ONI 2002 XI-XII (#21) 6 problems

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ONI 2001 XI-XII (#29) 6 problems

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ONI 2000 XI-XII (#1132) 6 problems

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