package test1;

public class Answer {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		int count_happyday = 0;

		for(int month=1; month<13; month++){

			//28日までの計算
			for(int day10=0; day10<=2; day10++){
				for(int day1=0; day1<=9; day1++){
					if(month == day10 + day1){
						count_happyday++;
					}
				}
			}
		}

		//30日は3月
		count_happyday++;
		//31日は4月だが該当なし
		
		System.out.print(count_happyday);

	}
}