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Add solution 118.

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src/Algorithms
- 0117.populating-next-right-pointers-in-each-node-ii
  - populating-next-right-pointers-in-each-node-ii.php
- 0118.pascals-triangle
  - pascals-triangle.php

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`@@ -0,0 +1,66 @@`
	`1`	`+/*`
	`2`	`+// Definition for a Node.`
	`3`	`+class Node {`
	`4`	`+ public $val;`
	`5`	`+ public $left;`
	`6`	`+ public $right;`
	`7`	`+ public $next;`
	`8`	`+`
	`9`	`+ @param Integer $val`
	`10`	`+ @param Node $left`
	`11`	`+ @param Node $right`
	`12`	`+ @param Node $next`
	`13`	`+ function __construct($val, $left, $right, $next) {`
	`14`	`+ $this->val = $val;`
	`15`	`+ $this->left = $left;`
	`16`	`+ $this->right = $right;`
	`17`	`+ $this->next = $next;`
	`18`	`+ }`
	`19`	`+}`
	`20`	`+*/`
	`21`	`+class Solution {`
	`22`	`+`
	`23`	`+ /**`
	`24`	`+ * @param Node $root`
	`25`	`+ * @return Node`
	`26`	`+ */`
	`27`	`+ function connect($root) {`
	`28`	`+ if ($root == null)`
	`29`	`+ {`
	`30`	`+ return null;`
	`31`	`+ }`
	`32`	`+`
	`33`	`+ $start = $root;`
	`34`	`+`
	`35`	`+ while ($start != null)`
	`36`	`+ {`
	`37`	`+ $temp = $start;`
	`38`	`+ $prev = new Node(-1, null, null, null);`
	`39`	`+ $start = null;`
	`40`	`+`
	`41`	`+ while ($temp != null)`
	`42`	`+ {`
	`43`	`+ if ($start == null)`
	`44`	`+ {`
	`45`	`+ $start = $temp->left == null ? $temp->right : $temp->left;`
	`46`	`+ }`
	`47`	`+`
	`48`	`+ if ($temp->left != null)`
	`49`	`+ {`
	`50`	`+ $prev->next = $temp->left;`
	`51`	`+ $prev = $temp->left;`
	`52`	`+ }`
	`53`	`+`
	`54`	`+ if ($temp->right != null)`
	`55`	`+ {`
	`56`	`+ $prev->next = $temp->right;`
	`57`	`+ $prev = $temp->right;`
	`58`	`+ }`
	`59`	`+`
	`60`	`+ $temp = $temp->next;`
	`61`	`+ }`
	`62`	`+ }`
	`63`	`+`
	`64`	`+ return $root;`
	`65`	`+ }`
	`66`	`+}`

Lines changed: 28 additions & 0 deletions

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