NAT1 mark
Consider an array . Suppose the merge sort algorithm is executed on array to sort it in increasing order. The merge sort algorithm will carry out a total of 7 merge operations.
A merge operation on sorted left array and sorted right array is said to be void if the output of the merge operation is the elements of array followed by the elements of array .
The number of void merge operations among these 7 merge operations is __________. (*answer in integer*)
Numerical answer