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Add solution 80.

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src/Algorithms/0080.remove-duplicates-from-sorted-array-ii
- remove-duplicates-from-sorted-array-ii.php

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	`1`	`+class Solution {`
	`2`	`+`
	`3`	`+ /**`
	`4`	`+ * @param Integer[] $nums`
	`5`	`+ * @return Integer`
	`6`	`+ */`
	`7`	`+ function removeDuplicates(&$nums) {`
	`8`	`+ $j = 0; $c = 0;`
	`9`	`+ for ($i = 1; $i < count($nums); $i++) {`
	`10`	`+ if ($nums[$i] == $nums[$j]) {`
	`11`	`+ $c++;`
	`12`	`+ }`
	`13`	`+ if ($nums[$i] == $nums[$j] && $c == 2) {`
	`14`	`+ $c--;`
	`15`	`+ continue;`
	`16`	`+ } else if ($nums[$i] != $nums[$j]) {`
	`17`	`+ $c = 0;`
	`18`	`+ }`
	`19`	`+ $j++;`
	`20`	`+ $tmp = $nums[$i];`
	`21`	`+ $nums[$i] = $nums[$j];`
	`22`	`+ $nums[$j] = $tmp;`
	`23`	`+ }`
	`24`	`+ return $j+1;`
	`25`	`+ }`
	`26`	`+}`

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