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Add missing number algorithm #9203

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merged 3 commits into from
Oct 1, 2023
Merged

Add missing number algorithm #9203

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156630f
Merge pull request #1 from TheAlgorithms/master
shreyabhalgat Oct 1, 2023
f94b52f
Added missing_number algorithm using bit manipulation
shreyabhalgat Oct 1, 2023
1a20752
Update bit_manipulation/missing_number.py
cclauss Oct 1, 2023
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21 changes: 21 additions & 0 deletions bit_manipulation/missing_number.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
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.


Example:
>>> find_missing_number([0, 1, 3, 4])
2
"""
n = len(nums)
missing_number = n

for i in range(n):
missing_number ^= i ^ nums[i]

return missing_number