A better description for this problem can be found at http://joonprogramming.blogspot.com/2016/04/google-code-jam-qualification-round-1a_17.html We have to find an NXN matrix, without repeating numbers at any row or column that must be ordered. And we have 2*N-1 strips of scrambled numbers, which can be rows or columns. The problem is to find what the missing strip is (notice that a NXN matrix has 2*N strips).
How to add?
How to subtract?
Find out missing number from a vector of 9 elements
Create an 'arrow-head" matrix
Vector of numbers divisible by 3
GJam 2014 China Rd A: Rational Number Tree (Large Values)
Kryptos - CIA Cypher Sculpture: Vigenere Encryption
REPMAT Enhancement - Faster for Large Row Replication of Vector
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