61 lines
1.5 KiB
PHP
61 lines
1.5 KiB
PHP
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<?php
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$cups = array_map('intval', str_split(file_get_contents('input.txt')));
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$min = min($cups);
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$max = max($cups);
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$current_index = 0;
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for ($i = 0; $i < 100; $i++) {
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$current_cup = $cups[$current_index];
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$pickups = array_splice($cups, $current_index + 1, 3);
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while (count($pickups) < 3) {
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$pickups[] = array_shift($cups);
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}
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$destination = $current_cup;
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do {
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$destination--;
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if ($destination < $min) {
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$destination = $max;
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}
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} while (in_array($destination, $pickups, true));
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$destination_index = array_search($destination, $cups, true);
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array_splice($cups, $destination_index + 1, null, $pickups);
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$cups = array_values($cups);
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// replace current index at its position
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if ($cups[$current_index] !== $current_cup) {
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$diff = array_search($current_cup, $cups, true) - $current_index;
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for ($j = 0; $j < abs($diff); $j++) {
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$cups[] = array_shift($cups);
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}
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}
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echo sprintf('move %u : %s%s', $i+1, implode(' ', $cups), "\n");
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$current_index++;
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if ($current_index >= count($cups)) {
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$current_index = 0;
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}
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}
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// moves done, now count from 1
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$index_1 = array_search(1, $cups, true);
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$final_labels = '';
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$current_index = $index_1 + 1;
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for ($i = 1, $l = count($cups); $i < $l; $i++) {
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if ($current_index >= $l) {
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$current_index = 0;
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}
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$final_labels .= $cups[$current_index];
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$current_index++;
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}
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echo $final_labels;
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