Rotate Array

/*
Logic:
  reverse the last k elements
  reverse the remaining elements
  revese the whole array now
*/
class Solution:
    def rotate(self, arr: List[int], k: int) -> None:
        arr[len(arr)-k:len(arr)]=reversed(arr[len(arr)-k:len(arr)])
        print(arr)
        arr[0:len(arr)-k]=reversed(arr[0:len(arr)-k])
        arr.reverse() #no need to return so inplace reverse is needed