function updateGrid($grid, $num, $stuck = [], $show = false)
{
if ($num < 1) {
return $grid;
}
$newGrid = $grid;
$xnum = count($grid);
$ynum = count(reset($grid));
foreach ($grid as $i => $row) {
foreach ($row as $j => $on) {
if (in_array([$i, $j], $stuck)) {
continue;
}
$minX = max(1, $i - 1);
$maxX = min($xnum, $i + 1);
$minY = max(1, $j - 1);
$maxY = min($ynum, $j + 1);
$neighbours = 0;
for ($m = $minX; $m <= $maxX; $m++) {
for ($n = $minY; $n <= $maxY; $n++) {
if ($m == $i && $n == $j) {
continue;
}
$neighbours += $grid[$m][$n] ? 1 : 0;
}
}
if ($on) {
$newGrid[$i][$j] = $neighbours == 2 || $neighbours == 3;
} else {
$newGrid[$i][$j] = $neighbours == 3;
}
}
}
if ($show) {
printGrid($newGrid);
}
return updateGrid($newGrid, $num - 1, $stuck, $show);
}
foreach ($ngrid as $y => $row) {
foreach ($row as $x => $n) {
if ($grid[$y][$x]) {
//A light which is on stays on when 2 or 3 neighbors are on, and turns off otherwise.
$newGrid[$y][$x] = $n == 2 || $n == 3;
} else {
//A light which is off turns on if exactly 3 neighbors are on, and stays off otherwise.
$newGrid[$y][$x] = $n == 3;
}
}
}
if (PART_2) {
return stuckLights($newGrid);
}
return $newGrid;
}
//loop
for ($i = 0; $i < $steps; $i++) {
$grid = iterate($grid);
}
//result
$count = 0;
foreach ($grid as $y => $row) {
foreach ($row as $x => $on) {
if ($on) {
$count++;
}
}
}
printGrid($grid);
print "Lights lit: {$count}\n";
$steps = 100;
$currentGrid = [];
foreach ($lines as $line) {
$line = str_replace('#', 1, $line);
$line = str_replace('.', 0, $line);
$chars = str_split($line);
$currentGrid[] = $chars;
}
// Step 2. Force all 4 corners ON
$size = count($currentGrid[0]);
$currentGrid[0][0] = 1;
$currentGrid[0][$size - 1] = 1;
$currentGrid[$size - 1][0] = 1;
$currentGrid[$size - 1][$size - 1] = 1;
echo "initial state" . PHP_EOL;
printGrid($currentGrid);
while ($steps > 0) {
$steps--;
$nextGrid = $currentGrid;
for ($i = 0; $i < count($currentGrid); $i++) {
for ($j = 0; $j < count($currentGrid[$i]); $j++) {
$nextGrid[$i][$j] = determineNextState($i, $j);
}
}
$currentGrid = $nextGrid;
}
$totalOn = 0;
for ($i = 0; $i < count($currentGrid); $i++) {
$totalOn += array_sum($currentGrid[$i]);
}
echo "Total lights on: " . $totalOn . PHP_EOL;
echo "<div class=level3>" . $group["level3"] . "</div>";
//-----------------------------------------------------------
$GroupID = $group["levelcode3"] != "" ? $group["levelcode3"] : $group["levelcode2"];
$dt = PdoDataAccess::runquery("select e.*,p.ElementValue
from PLN_Elements e
left join PLN_PlanItems p on(PlanID=? AND p.ElementID=e.ElementID)
where GroupID=? AND ParentID=0
group by ElementID
order by ElementID", array($PlanID, $GroupID));
for($i=0; $i < count($dt); $i++)
{
if($dt[$i]["ElementType"] == "grid")
printGrid($PlanID, $dt[$i]["ElementID"]);
if($dt[$i]["ElementType"] == "panel")
printForm($dt[$i]["ElementID"], $dt[$i]["ElementValue"]);
}
}
function printGrid($PlanID, $ParentID){
$columns = PdoDataAccess::runquery("select * from PLN_Elements e
where ParentID=? order by ElementID", array($ParentID));
echo "<center><table class=form border=1><tr>";
foreach($columns as $col)
echo "<td class=titles>" . $col["ElementTitle"] . "</td>";
echo "</tr>";
