Problem 876. Sum the entries of each column of a matrix which satisfy a logical condition.

What is Size?

Size refers to the number of nodes in a parse tree. Generally speaking, you can think of size as code length.
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Solution 237702 Submitted on 29 Apr 2013 at 14:31 
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Solution 233865 Submitted on 22 Apr 2013 by Yaroslav 
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Solution 233864 Submitted on 22 Apr 2013 
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Solution 232343 Submitted on 18 Apr 2013 
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Solution 232342 Submitted on 18 Apr 2013 
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Solution 225948 Submitted on 31 Mar 2013 by Paul Berglund 
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Solution 225377 Submitted on 29 Mar 2013 
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12Size
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Solution 224257 Submitted on 27 Mar 2013 by Dan 
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Solution 224228 Submitted on 27 Mar 2013 by Dan 
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Solution 224227 Submitted on 27 Mar 2013 
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Solution 199436 Submitted on 1 Feb 2013 by Claudio Gelmi 
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Solution 199435 Submitted on 1 Feb 2013 
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Solution 196988 Submitted on 26 Jan 2013 by Tomasz 
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Solution 196986 Submitted on 26 Jan 2013 
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Solution 195069 Submitted on 22 Jan 2013 by Thomas Vanaret 
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Solution 195008 Submitted on 22 Jan 2013 by Thomas Vanaret 
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Solution 195007 Submitted on 22 Jan 2013 
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16Size
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Solution 195006 Submitted on 22 Jan 2013 by Thomas Vanaret 
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Solution 195004 Submitted on 22 Jan 2013 
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22Size
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Solution 195003 Submitted on 22 Jan 2013 by Thomas Vanaret 
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17Size
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Solution 194990 Submitted on 22 Jan 2013 by Thomas Vanaret 
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Solution 194987 Submitted on 22 Jan 2013 by Thomas Vanaret 
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30Size
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Solution 194985 Submitted on 22 Jan 2013 by Thomas Vanaret 
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Solution 188678 Submitted on 9 Jan 2013 by Boris Huart 
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Solution 183515 Submitted on 30 Dec 2012 by Duane Hanselman 
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Solution 183514 Submitted on 30 Dec 2012 
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Solution 183513 Submitted on 30 Dec 2012 
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Solution 183511 Submitted on 30 Dec 2012 
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Solution 183510 Submitted on 30 Dec 2012 
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Solution 181247 Submitted on 24 Dec 2012 
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Solution 181246 Submitted on 24 Dec 2012 by Alfonso Nieto-Castanon 
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Solution 181244 Submitted on 24 Dec 2012 
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Solution 179932 Submitted on 20 Dec 2012 by Mehmet 
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Solution 179907 Submitted on 20 Dec 2012 by Takehiko KOBORI 
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Solution 179906 Submitted on 20 Dec 2012 
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14Size
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Solution 172175 Submitted on 4 Dec 2012 by Suresh Deoda 
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Solution 172174 Submitted on 4 Dec 2012 
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Solution 172173 Submitted on 4 Dec 2012 
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19Size
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Solution 170649 Submitted on 29 Nov 2012 by Evan 
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Solution 170648 Submitted on 29 Nov 2012 
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Solution 163719 Submitted on 18 Nov 2012 by José Ramón Menzinger 
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Solution 163717 Submitted on 18 Nov 2012 
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21Size
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Solution 158871 Submitted on 7 Nov 2012 by Venu Lolla 
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Solution 158869 Submitted on 7 Nov 2012 
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Solution 143373 Submitted on 28 Sep 2012 
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19Size
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Solution 143372 Submitted on 28 Sep 2012 by Vitaly Lavrukhin 
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Solution 143371 Submitted on 28 Sep 2012 
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Solution 143370 Submitted on 28 Sep 2012 
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15Size
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Solution 135030 Submitted on 4 Sep 2012 by Hardajit 
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Solution 131400 Submitted on 27 Aug 2012 by Carsten 
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