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Any idea on how to solve Q2 ????
Here is my idea , but not an absolute answer
Make a int state for direction , directions are u r d l , 0 1 2 3 , then turning right is (dir++)%4 and turning left is (dir--)%4 . make 2 integers x and y and 2 vectors to store the path traversed . do the traversal over the string again and again until we reach the starting point again . then do traversal again and store in another set of vectors . then compare the 2 vectors . If they are equal then the robot does move in a circle .
However this solution will get stuck when the robot dosent move in a circle
Maybe count the number of r and l in the string , if either is 0 then … no even this is not an absolute solution
Maybe execute few cycles of it and keep counting the number of movements to left right up or down
