ONI 2024 X (#1077) 3 problems

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ONI 2023 X (#193) 3 problems

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ONI 2022 X (#557) 3 problems

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ONI 2021 X (#563) 3 problems

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ONI 2019 X (#569) 6 problems

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ONI 2018 X (#575) 6 problems

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ONI 2017 X (#581) 6 problems

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ONI 2016 X (#587) 6 problems

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ONI 2015 X (#593) 6 problems

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ONI 2014 X (#599) 6 problems

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ONI 2013 X (#605) 6 problems

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ONI 2012 X (#611) 6 problems

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ONI 2011 X (#617) 6 problems

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ONI 2010 X (#623) 6 problems

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ONI 2009 X (#629) 6 problems

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ONI 2008 X (#635) 6 problems

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ONI 2007 X (#641) 6 problems

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ONI 2006 X (#647) 6 problems

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ONI 2005 X (#653) 6 problems

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ONI 2004 X (#659) 6 problems

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ONI 2003 X (#665) 6 problems

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ONI 2002 X (#671) 6 problems

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ONI 2001 X (#677) 6 problems

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ONI 2000 X (#681) 6 problems

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ONI 1998 X (#777) 2 problems

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