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Update 0209.长度最小的子数组.md

滑动窗口 version of python3 code

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Original file line number	Diff line number	Diff line change
`@@ -162,8 +162,27 @@ class Solution:`
`162`	`162`	`index += 1`
`163`	`163`	`return 0 if res==float("inf") else res`
`164`	`164`	```
`165`		`-`
`166`		`-`
	`165`	+```python3
	`166`	`+#滑动窗口`
	`167`	`+class Solution:`
	`168`	`+ def minSubArrayLen(self, target: int, nums: List[int]) -> int:`
	`169`	`+ if nums is None or len(nums)==0:`
	`170`	`+ return 0`
	`171`	`+ lenf=len(nums)+1`
	`172`	`+ total=0`
	`173`	`+ i=j=0`
	`174`	`+ while (j<len(nums)):`
	`175`	`+ total=total+nums[j]`
	`176`	`+ j+=1`
	`177`	`+ while (total>=target):`
	`178`	`+ lenf=min(lenf,j-i)`
	`179`	`+ total=total-nums[i]`
	`180`	`+ i+=1`
	`181`	`+ if lenf==len(nums)+1:`
	`182`	`+ return 0`
	`183`	`+ else:`
	`184`	`+ return lenf`
	`185`	+```
`167`	`186`	`Go:`
`168`	`187`	```go
`169`	`188`	`func minSubArrayLen(target int, nums []int) int {`

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