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AHOI2013 连通图
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TJOI2018 数学计算
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HNOI2018 道路
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APIO2017 商旅
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SDOI2017 新生舞会
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SCOI2008 天平
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SHOI2012 随机树
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HAOI2006 数字序列
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APIO2011 方格染色
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Interstellar battle
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