ONI 2025 (#1416) 30 problems

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ONI 2024 (#1071) 30 problems

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ONI 2023 (#192) 30 problems

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ONI 2022 (#490) 30 problems

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ONI 2021 (#491) 30 problems

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ONI 2019 (#492) 36 problems

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ONI 2018 (#493) 36 problems

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ONI 2017 (#494) 36 problems

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ONI 2016 (#495) 36 problems

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ONI 2015 (#496) 36 problems

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ONI 2014 (#497) 36 problems

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ONI 2013 (#498) 36 problems

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ONI 2012 (#499) 36 problems

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ONI 2011 (#500) 39 problems

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ONI 2010 (#501) 39 problems

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ONI 2009 (#503) 39 problems

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ONI 2008 (#505) 39 problems

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ONI 2007 (#544) 36 problems

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ONI 2006 (#545) 36 problems

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ONI 2005 (#546) 36 problems

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ONI 2004 (#547) 36 problems

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ONI 2003 (#548) 36 problems

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ONI 2002 (#549) 26 problems

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ONI 2001 (#550) 22 problems

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ONI 2000 (#683) 18 problems

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ONI 1998 (#778) 3 problems

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