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https://github.com/youngyangyang04/leetcode-master.git
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Merge branch 'youngyangyang04:master' into master
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@ -266,6 +266,38 @@ public class Solution
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}
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}
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```
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PHP:
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```php
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// 双指针
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// 一:
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function reverseString(&$s) {
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$left = 0;
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$right = count($s)-1;
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while($left<$right){
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$temp = $s[$left];
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$s[$left] = $s[$right];
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$s[$right] = $temp;
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$left++;
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$right--;
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}
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}
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// 二:
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function reverseString(&$s) {
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$this->reverse($s,0,count($s)-1);
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}
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// 按指定位置交换元素
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function reverse(&$s, $start, $end) {
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for ($i = $start, $j = $end; $i < $j; $i++, $j--) {
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$tmp = $s[$i];
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$s[$i] = $s[$j];
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$s[$j] = $tmp;
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}
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}
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```
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Scala:
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```scala
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object Solution {
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@ -157,6 +157,26 @@ var validMountainArray = function(arr) {
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};
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```
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## TypeScript
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```typescript
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function validMountainArray(arr: number[]): boolean {
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const length: number = arr.length;
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if (length < 3) return false;
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let left: number = 0,
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right: number = length - 1;
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while (left < (length - 1) && arr[left] < arr[left + 1]) {
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left++;
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}
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while (right > 0 && arr[right] < arr[right - 1]) {
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right--;
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}
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if (left === right && left !== 0 && right !== length - 1)
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return true;
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return false;
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};
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```
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