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janeyziqinglin janeyziqinglin

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Merge branch 'youngyangyang04:master' into master

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problems
- 0344.反转字符串.md
- 0941.有效的山脉数组.md

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`‎problems/0344.反转字符串.md‎`

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`@@ -266,6 +266,38 @@ public class Solution`
`266`	`266`	`}`
`267`	`267`	`}`
`268`	`268`	```
	`269`	`+`
	`270`	`+`
	`271`	`+PHP:`
	`272`	+```php
	`273`	`+// 双指针`
	`274`	`+// 一:`
	`275`	`+function reverseString(&$s) {`
	`276`	`+ $left = 0;`
	`277`	`+ $right = count($s)-1;`
	`278`	`+ while($left<$right){`
	`279`	`+ $temp = $s[$left];`
	`280`	`+ $s[$left] = $s[$right];`
	`281`	`+ $s[$right] = $temp;`
	`282`	`+ $left++;`
	`283`	`+ $right--;`
	`284`	`+ }`
	`285`	`+}`
	`286`	`+`
	`287`	`+// 二:`
	`288`	`+function reverseString(&$s) {`
	`289`	`+ $this->reverse($s,0,count($s)-1);`
	`290`	`+}`
	`291`	`+// 按指定位置交换元素`
	`292`	`+function reverse(&$s, $start, $end) {`
	`293`	`+ for ($i = $start, $j = $end; $i < $j; $i++, $j--) {`
	`294`	`+ $tmp = $s[$i];`
	`295`	`+ $s[$i] = $s[$j];`
	`296`	`+ $s[$j] = $tmp;`
	`297`	`+ }`
	`298`	`+ }`
	`299`	+```
	`300`	`+`
`269`	`301`	`Scala:`
`270`	`302`	```scala
`271`	`303`	`object Solution {`

`‎problems/0941.有效的山脉数组.md‎`

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`@@ -157,6 +157,26 @@ var validMountainArray = function(arr) {`
`157`	`157`	`};`
`158`	`158`	```
`159`	`159`
	`160`	`+## TypeScript`
	`161`	`+`
	`162`	+```typescript
	`163`	`+function validMountainArray(arr: number[]): boolean {`
	`164`	`+ const length: number = arr.length;`
	`165`	`+ if (length < 3) return false;`
	`166`	`+ let left: number = 0,`
	`167`	`+ right: number = length - 1;`
	`168`	`+ while (left < (length - 1) && arr[left] < arr[left + 1]) {`
	`169`	`+ left++;`
	`170`	`+ }`
	`171`	`+ while (right > 0 && arr[right] < arr[right - 1]) {`
	`172`	`+ right--;`
	`173`	`+ }`
	`174`	`+ if (left === right && left !== 0 && right !== length - 1)`
	`175`	`+ return true;`
	`176`	`+ return false;`
	`177`	`+};`
	`178`	+```
	`179`	`+`
`160`	`180`
`161`	`181`
`162`	`182`

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