<?php
    $months = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12];
    $days = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
    $happyDays = 0;

    foreach ($months as $key => $month) {
        for ($i = 1; $i <= $days[$key]; $i++) {
            if ($month == (floor($i / 10) + floor($i % 10))) {
                $happyDays++;
            }
        }
    }

    echo $happyDays . "\n";