Consider the following left-rotate and right-rotate functions commonly used in self-adjusting BSTs
T1, T2 and T3 are subtrees of the tree rooted with y (on left side)
or x (on right side)
y x
/ \ Right Rotation / \
x T3 – - – - – - – > T1 y
/ \ < - - - - - - - / \
T1 T2 Left Rotation T2 T3
Which of the following is tightest upper bound for left-rotate and right-rotate operations.