leetcode34 Search for a Range
class Solution:
def searchRange(self, nums, target):
"""
:type nums: List[int]
:type target: int
:rtype: List[int]
"""
if not nums:
return [-1, -1]
def search(n):
st = 0
ed = len(nums) - 1
while st <= ed:
mid = (st + ed) // 2
if nums[mid] == n:
if mid-1 >= 0 and nums[mid - 1] == n:
mid -= 1
return mid
if nums[mid] < n:
st = mid + 1
else:
ed = mid - 1
return st
right = left = search(target)
if left>len(nums)-1:
return [-1, -1]
try:
if nums[left] != target:
return [-1, -1]
except:
pass
try:
while left-1 >= 0 and nums[left - 1] == target:
left -= 1
while nums[right + 1] == target:
right += 1
except:
pass
return [left, right]
