25 lines
446 B
PHP
25 lines
446 B
PHP
function isHappy($n) {
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while (1) {
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$total = 0;
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while ($n > 0) {
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$total += pow(($n % 10), 2);
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$n /= 10;
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}
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if ($total == 1)
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return true;
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if (array_key_exists($total, $past))
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return false;
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$n = $total;
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$past[$total] = 0;
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}
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}
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$i = $cnt = 0;
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while ($cnt < 8) {
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if (isHappy($i)) {
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echo "$i ";
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$cnt++;
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}
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$i++;
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}
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