Tag Archives: code challenge

Solving a HackerRank algorithm problem – Matrix Layer Rotation

Matrix Layer Rotation

I enjoy solving interesting HackerRank algorithm problems.  I came across one recently called Matrix Layer Rotation – appropriately labeled “hard” by the author.

I posted my solution as a playground on GitHub.

The problem is to print out a rotated representation of a m x n  matrix given the parameters:

m – number of rows
n – number of columns
r – number of rotations

Looking at the constraints

2 <= m, n <= 300
1 <= r <= 10^^9
min(m,n) % 2 = 0

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Image manipulation using view transitions and transforms

Image Manipulation

I recently took on a code challenge that was delivered in an interesting fashion.   I was given a video that showed the manipulation of two images and was asked to create an iOS app that had the same behavior as the video.

ImageTransform

 

Requirements

After watching the video (many times), I extracted the following requirements for my app:

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