Given an array of numbers, remove the elements according to following conditions

• remove an element arr[i] if and only if arr[i-1] < arr[i]

You might get the resulting array after removing the elements. Repeat the process until array remains unchanged. Return the number of steps in which the array remains unchanged.

Eg:
[6,3,1,8,9,4,3,2,8,9]

after 1st iteration we get

Step 1: [6,3,1,4,3,2] ---> [8,9] is removed since 1<8<9 && 2<8<9
Step 2: [6,3,1,3,2] ---> [4] is removed since 1<4
Step 3: [6,3,1,2] ---> [3] is removed since 1<3
Step 4: [6,3,1] ---> [2] is removed since 1<2

Answer: 4 (Total no. of steps are 4)