Problem 43177. Extract a specific part of matrix!

Created by Jang geun Choi

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David Verrelli on 3 Sep 2018

This user (ALBERT ALEXANDER STONIER) appears to have gamed the system, with fraudulent "likes" of this unremarkable solution submitted by 'sock-puppet' accounts. —DIV

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Problem 43177. Extract a specific part of matrix!

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Problem 43177. Extract a specific part of matrix!

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