The pseudocode of a function \( fun() \) is given below:
fun(int A[0, ..., n-1]) {
for i = 0 to n-2
for j = 0 to n - i - 2
if (A[j] > A[j+1])
then swap A[j] and A[j+1]
}
Let \( A[0, \ldots, 29] \) be an array storing 30 distinct integers in descending order.
The number of swap operations that will be performed, if the function \( fun() \) is called with \( A[0, \ldots, 29] \) as argument, is __________ (Answer in integer).