Rearrange a given array so that Arr[i] becomes Arr[Arr[i]] with O(1) extra space.

ARRANGE.py

def arrange(self, A):
        for i in range(len(A)) :
            A[i] += (A[A[i]]%len(A)) * len(A)
        for i in range(len(A)) :
            A[i] = A[i]/len(A)
            
# Rearrange a given array so that Arr[i] becomes Arr[Arr[i]] with O(1) extra space.
# Input: arr[]  = {3, 2, 0, 1}
# Output: arr[] = {1, 0, 3, 2}