<?php
$days_array = array(31,28,31,30,31,30,31,31,30,31,30,31);
$happy_day_count = 0;
foreach ( $days_array as $month => $days ) {
	for ( $day=1; $day<=$days; $day++ ) {
		if ( (floor($day/10) + ($day%10)) == ($month+1) ) {
			$happy_day_count++;
		}
	}
}
echo $happy_day_count .PHP_EOL;