Given a matrix, a robot is located at the top left corner. The robot can move four directions (up, down, left, right). Now the robot needs to reach the bottom right corner of the matrix.
Return the path with the minimum delta of all paths from the upper left corner to the bottom right corner...
![](https://d2qikg3rnxq7n1.cloudfront.net/interviewquestions/3-path-min-delta-min.png)
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