Editorial for PIB '20 P5 - 4D Matrices - Olympiads 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: $\mathcal{O}(N^2 \log N)$ $O (N^{2} \log N)$

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