Algorithms and DataStructures
https://www.geeksforgeeks.org/find-maximum-value-of-sum-iarri-with-only-rotations-on-given-array-allowed/
http://googleweblight.com/i?u=http://javabypatel.blogspot.in/2015/12/detect-loop-in-linked-list.html http://javabypatel.blogspot.in/2016/10/clone-linked-list-next-random-pointer.html?m=1