#include <iostream>
#include <sstream>
#include <string>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <vector>
#include <array>
#include <memory>
#include <algorithm>

namespace Util
{

std::vector<std::string> Split(const std::string& str, const char delim)
{
	std::istringstream iss(str);
	std::vector<std::string> ret;
	std::string tmp;

	while(std::getline(iss, tmp, delim))
	{
		ret.push_back(tmp);
	}

	return ret;
}

int Stoi(const std::string& buf)
{
	return std::atoi(buf.c_str());
}

double Stof(const std::string& buf)
{
	return std::atof(buf.c_str());
}

std::vector<int> ConvertInt(const std::vector<std::string>& vecBuf)
{
	std::vector<int> ret(vecBuf.size());

	for(int cur = 0; cur < static_cast<int>(ret.size()); ++cur)
	{
		ret[cur] = Stoi(vecBuf[cur]);
	}

	return ret;
}

std::vector<double> ConvertDouble(const std::vector<std::string>& vecBuf)
{
	std::vector<double> ret(vecBuf.size());

	for(int cur = 0; cur < static_cast<int>(ret.size()); ++cur)
	{
		ret[cur] = Stof(vecBuf[cur]);
	}

	return ret;
}

}// namespace Util

const int Month = 12;
const std::array<int, Month> LastDay = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int main()
{
	// 入出力の速度向上
	std::cin.tie(0);
	std::ios::sync_with_stdio(false);

	std::string buf;
	std::vector<std::string> vecBuf;

	int target = 0;

	for(int count = 0; count < Month; ++count)
	{
		int month = count + 1;

		for(int oneScale = 0; oneScale <= month; ++oneScale)
		{
			int tenScale = month - oneScale;
			if(tenScale * 10 + oneScale <= LastDay[count] && tenScale < 10 && oneScale < 10)
			{
				// printf("%2d/%d%d\n", month, tenScale, oneScale);
				++target;
			}
		}
	}

	printf("%d\n", target);

	return 0;
}