<?php
// Function to generate a list of '(' and ')'
// This represents (1, 3)...(n-1, n)
function generateList($n) {
$array = array();
for ($i = 0; $i<$n; $i++) {
$array[2*$i] = '(';
$array[2*$i+1] = ')';
}
return $array;
}
// Function to display the previous list
function displayList($array) {
$list = '';
$i = 1;
foreach ($array as $value) {
if ($value == '(') {
$list = $list.$value.$i.',';
} else { // It's ')' case
$list = $list.','.$i.$value;
}
$i = $i+2;
}
// The function is not perfect.
$list = str_replace(',,', ',', $list);
echo $list."\n";
}
// Function to sort the list with cocktailSort
function sortList($array) {
$n = count($array);
$isSwap = true;
while ($isSwap) {
$isSwap = false;
for ($i = 0; $i < $n-1; $i++) {
// If we have ')(' we swap the parenthesis
if ($array[$i] == ')' && $array[$i+1] == '(') {
$array[$i] = '(';
$array[$i+1] = ')';
// We display the new list
displayList($array);
$isSwap = true;
}
}
for ($i = $n-2; $i >= 0; $i--) {
// If we have ')(' we swap the parenthesis
if ($array[$i] == ')' && $array[$i+1] == '(') {
$array[$i] = '(';
$array[$i+1] = ')';
// We display the new list
displayList($array);
$isSwap = true;
}
}
}
}
function show($n) {
$array = generateList($n);
displayList($array);
sortList($array);
}
show(8);
?>
<?php
function generateGraph($n) {
$graph = array();
echo 'tot';
for ($i = 0; $i<4*$n; $i++) {
echo 't';
$graph[$i+1] = 0;
}
return $graph;
}
var_dump(generateGraph(3));
?>
