23 lines
624 B
PHP
23 lines
624 B
PHP
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<?php
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$numbers = array_map('intval', explode("\n", file_get_contents('input.txt')));
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$current_index = 0;
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$step = 25;
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while (true) {
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for ($l = count($numbers) - $step; $current_index <= $l; $current_index++) {
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$number_to_test = $numbers[$current_index + $step];
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$numbers_to_addition = array_slice($numbers, $current_index, $step);
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foreach ($numbers_to_addition as $number) {
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if (in_array($number_to_test - $number, $numbers_to_addition, true)) {
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$current_index++;
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break 2;
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}
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}
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echo $number_to_test;
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exit;
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}
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}
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