using System;

class Q0188
{
	public static void Main()
	{
		int[] day = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

		int count = 0;
		for(int i=0; i<12; i++)
		{
			for(int j=1; j<=day[i]; j++)
			{
				int s = 0;
				for(int d=j; d>0; d/=10)
				{
					s += d % 10;
				}
				if(s == i+1)
				{
					count ++;
				}
			}
		}

		Console.WriteLine(count);
	}
}