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Discussion of Problem 1675. Lunar Code 2

WA#2
Posted by darkhac 21 Feb 2009 20:47

if matrix 2*3
 ________
|__|__|__|
|__|__|__|
 and 1 line and 1 column is zero =>
 ________
|_#|_#|_#|
|_#|__|__| => if in empty cell is 0
=> 2 column is zero => l>1 => all empty cell is 1 => 1 variant