力扣228. 汇总区间

 1 class Solution:
 2     def summaryRanges(self, nums: List[int]) -> List[str]:
 3         left,right,lens,ans = 0,0,len(nums),[]
 4         while left < lens:
 5             right = left
 6             while right < lens:
 7                 if right == left or nums[right] == nums[right - 1] + 1:
 8                     right += 1
 9                 else:break
10             if right - 1 > left:
11                 ans.append(str(nums[left]) + ‘->‘ + str(nums[right-1]))
12             else:
13                 ans.append(str(nums[left]))
14             left = right
15         return ans