mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-10-06 05:39:30 +00:00
32 lines
877 B
Python
32 lines
877 B
Python
def is_contains_unique_chars(input_str: str) -> bool:
|
|
"""
|
|
Check if all characters in the string is unique or not.
|
|
>>> is_contains_unique_chars("I_love.py")
|
|
True
|
|
>>> is_contains_unique_chars("I don't love Python")
|
|
False
|
|
|
|
Time complexity: O(n)
|
|
Space complexity: O(1) 19320 bytes as we are having 144697 characters in unicode
|
|
"""
|
|
|
|
# Each bit will represent each unicode character
|
|
# For example 65th bit representing 'A'
|
|
# https://stackoverflow.com/a/12811293
|
|
bitmap = 0
|
|
for ch in input_str:
|
|
ch_unicode = ord(ch)
|
|
ch_bit_index_on = pow(2, ch_unicode)
|
|
|
|
# If we already turned on bit for current character's unicode
|
|
if bitmap >> ch_unicode & 1 == 1:
|
|
return False
|
|
bitmap |= ch_bit_index_on
|
|
return True
|
|
|
|
|
|
if __name__ == "__main__":
|
|
import doctest
|
|
|
|
doctest.testmod()
|