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#!/usr/bin/env python
# -*- coding: utf-8 -*-
from typing import List
import unittest
def find_missing_numbers(arr: List[int]) -> List[int]:
"""
Find all missing numbers in the range 0..n where n is the array size.
Args:
arr: A list of unique integers.
Returns:
A list of missing integers in the range 0..n where n is the array size.
"""
n = len(arr)
s = set(arr)
missing_numbers = []
for i in range(n + 1):
if i not in s:
missing_numbers.append(i)
return missing_numbers
# test cases
class TestMissingNumbers(unittest.TestCase):
def test_example1(self):
self.assertEqual(find_missing_numbers([0, 1, 3]), [2])
def test_example2(self):
self.assertEqual(find_missing_numbers([0, 1]), [2])
if __name__ == '__main__':
unittest.main()
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