// No.188 HAPPY DAY
package main

import (
	"fmt"
	"strconv"
	"time"
)

func main() {
	start := time.Date(2015, 1, 1, 0, 0, 0, 0, time.UTC)
	var ans int = 0
	for i := 0; i < 365; i++ {
		_, m, d := start.AddDate(0, 0, i).Date()
		d1, _ := strconv.Atoi(string(fmt.Sprintf("%02d", d)[0]))
		d2, _ := strconv.Atoi(string(fmt.Sprintf("%02d", d)[1]))
		if int(m) == (d1 + d2) {
			ans++
		}
	}
	fmt.Println(ans)
}