def is_contains_unique_chars(input_str: str) -> bool:

    # 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