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Update0376.摆动序列,添加C#

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Original file line number	Diff line number	Diff line change
`@@ -692,6 +692,27 @@ object Solution {`
`692`	`692`	`}`
`693`	`693`	`}`
`694`	`694`	```
	`695`	`+### C#`
	`696`	+```csharp
	`697`	`+public class Solution`
	`698`	`+{`
	`699`	`+ public int WiggleMaxLength(int[] nums)`
	`700`	`+ {`
	`701`	`+ if (nums.Length < 2) return nums.Length;`
	`702`	`+ int curDiff = 0, preDiff = 0, res = 1;`
	`703`	`+ for (int i = 0; i < nums.Length - 1; i++)`
	`704`	`+ {`
	`705`	`+ curDiff = nums[i + 1] - nums[i];`
	`706`	`+ if ((curDiff > 0 && preDiff <= 0) \|\| (curDiff < 0 && preDiff >= 0))`
	`707`	`+ {`
	`708`	`+ res++;`
	`709`	`+ preDiff = curDiff;`
	`710`	`+ }`
	`711`	`+ }`
	`712`	`+ return res;`
	`713`	`+ }`
	`714`	`+}`
	`715`	+```
`695`	`716`
`696`	`717`	`<p align="center">`
`697`	`718`	`<a href="https://programmercarl.com/other/kstar.html" target="_blank">`

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