// yukicoder: No.188 HAPPY DAY
// 2019.4.13 bal4u

#include <stdio.h>

int daysOfMonth(int year, int month)
{
	static int days[12] = {
		31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

	if (month < 1 || month > 12) month = 1;

	if (month == 2) return days[1] +
		(year % 4 == 0 && year % 100 != 0 || year % 400 == 0);
	else return days[month - 1];
}

int s[35];

int main()
{
	int i, m, d, ans;

	for (i = 1; i <= 31; i++) s[i] = (i % 10) + (i / 10);
	ans = 0;
	for (m = 1; m <= 12; m++) {
		d = daysOfMonth(2015, m);
		for (i = 1; i <= d; i++) if (s[i] == m) ans++;
	}
	printf("%d\n", ans);
	return 0;
}