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con_nha_ngheo's blog

By con_nha_ngheo, 6 years ago, In English,

someone who has solved this problem can help me, give me some idea :( It's a problem from reginal ACM in jakarta 2013

https://icpcarchive.ecs.baylor.edu/index.php?option=com_onlinejudge&Itemid=8&category=596&page=show_problem&problem=4449

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