Double the first element and move zero to end
Given an array\list containing integers, zero is considered an invalid number and the rest of the other numbers are valid. If the two nearest valid numbers are equal then double the value of the right one and make the left one 0. ignore any comparison with zero At last move all zeros to the right Input: 2 4 5 0 0 5 5 4 8 6 0 6 8 Iteration Flow to understand the problem: 2 4 .... 2 4 5.... 2 4 5 0 ... 2 4 5 0 0 ..... 2 4 0 0 0 10 5... 2 4 0 0 0 10 5 4 8 0 0 12 8 Final Output Array: 2 4 10 5 4 8 12 8 0 0 0 0 0 <?php // Your code here! $arr = [2,4,5,0,0,5,5,4,8,6,0,6,8]; $arr_count = count($arr); $res = []; for ($i = 0, $j=0; $i < $arr_count-1; $i++) { if($arr[$i]==0 && $i!=0){ $arr[$i] = $arr[$i-1]; $arr[$i-1] = 0; } else if($i!=0 && $arr[$i]!=0 && ($arr[$i] == $arr[$i-1])){ $arr[$i-1] = 0; $arr[$i] = 2 * $arr[$i]...