text: def uniqueint(arr):
      unique_arr = 0
      for i in arr:
          print('This is the current id begin check',i)
          print('This is the current unique id',unique_arr)
          print('This is the reult of XOR',unique_arr^i,"\n")
          
          unique_arr ^= i
      return unique_arr
      
  print(uniqueint([1,2,3,2,1]))