class Solution:

def moveElements(self, arr):

write_idx = 1

curr_val = arr[0]



for read_idx in range(1, len(arr)):

  if arr[read_idx] > curr_val:

    curr_val = arr[read_idx]

    arr[write_idx], arr[read_idx] = arr[read_idx], arr[write_idx]

    write_idx += 1



return write_idx