35 lines
846 B
PHP
35 lines
846 B
PHP
<?php
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include '../functions.php';
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$array = array_map(fn($row) => array_filter(explode(' ', $row)), explode("\n", file_get_contents('./input.txt')));
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$array = matrix_rotate_clockwise($array);
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$sums = [];
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foreach ($array as $row) {
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$operation = array_shift($row);
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if ($operation == '+') {
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$data = array_sum($row);
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}
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if ($operation == '*') {
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$data = array_reduce($row, function($carry, $item) {
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$carry *= $item;
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return $carry;
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}, 1);
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}
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$sums[] = $data;
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print_message(sprintf('%s = %s', implode($operation, $row), $data));
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}
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print_message(array_sum($sums));
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function matrix_rotate_clockwise($matrix)
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{
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array_unshift($matrix, null);
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$matrix = call_user_func_array('array_map', $matrix);
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$matrix = array_map('array_reverse', $matrix);
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return $matrix;
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} |