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Add missing number algorithm #9203

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shreyabhalgat
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Describe your change:

Added a new algorithm for finding the missing number in a list of consecutive integers using bit manipulation.

  • Add an algorithm?
  • Fix a bug or typo in an existing algorithm?
  • Documentation change?

Checklist:

  • I have read CONTRIBUTING.md.
  • This pull request is all my own work -- I have not plagiarized.
  • I know that pull requests will not be merged if they fail the automated tests.
  • This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
  • All new Python files are placed inside an existing directory.
  • All filenames are in all lowercase characters with no spaces or dashes.
  • All functions and variable names follow Python naming conventions.
  • All function parameters and return values are annotated with Python type hints.
  • All functions have doctests that pass the automated testing.
  • All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
  • If this pull request resolves one or more open issues then the description above includes the issue number(s) with a closing keyword: "Fixes #ISSUE-NUMBER

@algorithms-keeper algorithms-keeper bot added the require type hints https://docs.python.org/3/library/typing.html label Oct 1, 2023
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Click here to look at the relevant links ⬇️

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@algorithms-keeper algorithms-keeper bot added the awaiting reviews This PR is ready to be reviewed label Oct 1, 2023
@TheAlgorithms TheAlgorithms deleted a comment from algorithms-keeper bot Oct 1, 2023
Comment on lines 1 to 9
def find_missing_number(nums):
"""
Finds the missing number in a list of consecutive integers.

Args:
nums (List[int]): A list of integers.

Returns:
int: The missing number.
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@cclauss cclauss Oct 1, 2023

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Mypy can test data types in the function signature, but not in the comments.

Do not repeat the datatypes in both places because readers will be confused if one is changed and the other is not.

Suggested change
def find_missing_number(nums):
"""
Finds the missing number in a list of consecutive integers.
Args:
nums (List[int]): A list of integers.
Returns:
int: The missing number.
def find_missing_number(nums: list[int]) -> int:
"""
Finds the missing number in a list of consecutive integers.
Args:
nums: A list of integers.
Returns:
The missing number.

@algorithms-keeper algorithms-keeper bot removed the require type hints https://docs.python.org/3/library/typing.html label Oct 1, 2023
@algorithms-keeper algorithms-keeper bot removed the awaiting reviews This PR is ready to be reviewed label Oct 1, 2023
@cclauss cclauss merged commit cfabd91 into TheAlgorithms:master Oct 1, 2023
sedatguzelsemme pushed a commit to sedatguzelsemme/Python that referenced this pull request Sep 15, 2024
* Added missing_number algorithm using bit manipulation

* Update bit_manipulation/missing_number.py

---------

Co-authored-by: Christian Clauss <cclauss@me.com>
@isidroas isidroas mentioned this pull request Jan 25, 2025
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2 participants