package main

import (
	"fmt"
	"time"
)

func main() {
	const year = 2015
	daysOfMonth := []int{
		31,
		time.Date(year, time.March, 1, 0, 0, 0, 0, time.UTC).AddDate(0, 0, -1).Day(),
		31, 30, 31, 30, 31, 31, 30, 31, 30, 31,
	}
	tab := makeSuujiWaTab()

	ans := 0
	for month := 1; month <= 12; month++ {
		maxdays := daysOfMonth[month-1]
		for day := 1; day <= maxdays; day++ {
			if month == tab[day-1] {
				ans++
			}
		}
	}
	fmt.Println(ans)
}

func makeSuujiWaTab() []int {
	const maxdays = 31
	tab := make([]int, maxdays)
	for day := 1; day <= maxdays; day++ {
		sum := 0
		for _, c := range fmt.Sprintf("%d", day) {
			sum += int(c - 48)
		}
		tab[day-1] = sum
	}
	return tab
}