import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] days = new int[]{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
        int count = 0;
        for (int i = 0; i < days.length; i++) {
            for (int k = 1; k <= days[i]; k++) {
                if (i + 1 == getNum(k)) {
                    count++;
                }
            }
        }
        System.out.println(count);
    }
    
    static int getNum(int x) {
        int ans = 0;
        while (x > 0) {
            ans += x % 10;
            x /= 10;
        }
        return ans;
    }
}