LeetCode #1295: Find Numbers with Even Number of Digits
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LeetCode #1295: Find Numbers with Even Number of Digits:
python
class Solution:
def findNumbers(self, nums: List[int]) -> int:
def is_even(n):
return len(str(n)) & 1 == 0
return sum((is_even(num) for num in nums))With pure integers:
python
class Solution:
def findNumbers(self, nums: List[int]) -> int:
def is_even(n):
## return len(str(n)) & 1 == 0
ans = True
while n > 0:
n //= 10
ans = not ans
return ans
return sum((is_even(num) for num in nums))Or 104 / 105 test cases passed (blame floating point approximation):
python
class Solution:
def findNumbers(self, nums: List[int]) -> int:
def is_even(n):
return int(log(n) / log(10)) & 1 == 1
return sum((is_even(num) for num in nums))