import java.io.*;
import java.util.*;
import java.math.*;

class Main188 {
	
	public static void out (Object o) {
		System.out.println(o);
	}
	
	public static int getSum (int n) {
		int ret = 0;
		while (n != 0) {
			ret += n % 10;
			n /= 10;
		}
		return ret;
	}
	
	public static void main (String[] args) throws IOException {
		BufferedReader br = 
			new BufferedReader(new InputStreamReader(System.in));
		
		int[] max = {0,31,28,31,30,31,30,31,31,30,31,30,31};
		int ans = 0;
		for (int m = 1; m < max.length; m++) {
			for (int d = 1; d <= max[m]; d++) {
				if (m == getSum(d)) ans++;
			}
		}
		out(ans);
	}
}