public class no188 {
    public static void main(String[] args) {
        int sum = 0;
        int[] days = {31,28,31,20,31,30,31,31,30,31,30,31};
        for (int i=1; i<=12; i++) {
            for (int j=1; j<=days[i-1]; j++) {
                if (i == sumDigits(j)) sum++;
            }
        }
        System.out.println(sum);
    }

    static int sumDigits(int n) {
        int sum = 0;
        while (n != 0) {
            sum += n%10;
            n /= 10;
        }
        return sum;
    }
}