import java.time.*;

public class Main {
    public static void main(String[] args) throws Exception {
        int ans = 0;
        LocalDate start = LocalDate.of(2015, 1, 1);
        LocalDate end   = LocalDate.of(2016, 1, 1);
        
        while (start.isBefore(end)) {
            int m = start.getMonthValue();
            int d = start.getDayOfMonth();
            //System.out.println(m+"月"+d+"日");
            if (m == d / 10 + d % 10) ans++;
            start = start.plusDays(1);
        }
        
        System.out.println(ans);
    }
}