SP8419 BTCODE_A - Traversing Grid

Given 2 points in 2 dimensional space (xs,ys) and (xd,yd), your task is to find whether (xd,yd) can be reached from (xs,ys) by making a sequence of zero or more operations. From a given point (x, y), the operations possible are: a) Move to point (y, x) b) Move to point (x, -y) c) Move to point (x+y, y) d) Move to point (2\*x, y)

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