#include <stdio.h>

using namespace std;

int main()
{
    int happydays = 0;
    int days[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30};

    for (int i = 0; i < 12; i++)
    {
        int month = i + 1;

        for (int j = 0; j < days[i]; j++)
        {
            int num = j;
            int sum = 0;

            while (num)
            {
                int dig = num % 10;
                sum += dig;
                num = num / 10;
            }

            if (sum == month)
            {
                happydays++;
            }
        }
    }

    printf("%d\n", happydays);
}