Editorial for PIB '20 P5 - 4D Matrices - DMOJ: Modern Online Judge

Editorial for PIB '20 P5 - 4D Matrices

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Author: Plasmatic

Let $m$ ~m~ be the median of array $k$ ~k~ if we set $v$ ~v~ to all $0$ ~0~.

Observe that if we shift every element of $a$ ~a~ by $-m$ ~-m~, the median of array $k$ ~k~ is now $0$ ~0~.

To shift the elements of $a$ ~a~ by $-m$ ~-m~, simply assign $-m$ ~-m~ to all elements in $v$ ~v~.

Time Complexity: $\mathcal{O}(N^2 \log N)$ ~\mathcal{O}(N^2 \log N)~

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