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Discussion of Problem 1390. Shots at Walls

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Any hints? Solved by interval trees?Safe Bird1390. Shots at Walls8 Mar 2018 20:005  
I think you can add delete wall operationShen Yang1390. Shots at Walls25 Oct 2016 06:081  
This problem is not so difficultLSBG1390. Shots at Walls29 Sep 2008 15:131  
Changes in problem 1390 "Shots at walls" (+)Sandro (USU)1390. Shots at Walls15 Jun 2007 14:521  
Less than 750 Kb. is used while the ML is 64 Mb. Faint (-)Dmitry 'Diman_YES' Kovalioff1390. Shots at Walls21 May 2006 13:141  

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