#!/usr/bin/env python

class Array(object):
  def __init__(self, default):
    self.indexToValue = {}
    self.default = default

  def get(self, index):
    return self.indexToValue.get(index, self.default)

  def set(self, index, value):
    self.indexToValue[index] = value

  def reset(self, default):
    self.indexToValue = {}
    self.default = default