#include <iostream>
#include <map>
#include <string>


int sum_day_number(int day) {
	std::string day_str(std::to_string(day));
	int result = 0;
	for (auto i = day_str.begin(); i != day_str.end(); i++) {
		result += (*i - '0');
	}
	return result;
}

int main(int argc, char *argv[]) {
	std::map<int, int> month_and_days({
		{1, 31},
		{2, 28},
		{3, 31},
		{4, 30},
		{5, 31},
		{6, 30},
		{7, 31},
		{8, 31},
		{9, 30},
		{10, 31},
		{11, 30},
		{12, 31}
	});

	int happy_days = 0;
	for (auto month_entry: month_and_days) {
		int month = month_entry.first;
		int days = month_entry.second;
		for (int j = 1; j < days; j++) {
			if (month == sum_day_number(j)) {
				happy_days++;
			}
		}
	}
	std::cout << happy_days << std::endl;
	return 0;
}