class Solution:
def intersectionSizeTwo(self, intervals: List[List[int]]) -> int:
intervals.sort(key=lambda x: x[1])
nums = []
for start, end in intervals:
count = 0
if len(nums) >= 1 and start <= nums[-1] <= end:
count += 1
if len(nums) >= 2 and start <= nums[-2] <= end:
count += 1
if count == 0:
nums.append(end - 1)
nums.append(end)
elif count == 1:
nums.append(end)
return len(nums)