import java.util.*;

class Main {

	private static final int YEAR = 2015;
	private static final int MONTH = 0;
	private static final int DATE = 1;

	public static void main(String[] args) {

		/* メイン処理開始 */
		// 変数初期化
		int result = 0;
		Calendar calendar = Calendar.getInstance();
		int monthMin = calendar.getMinimum(Calendar.MONTH);
		int monthMax = calendar.getMaximum(Calendar.MONTH);
		// 結果設定
		for (int i = monthMin; i <= monthMax; i++) {
			calendar.set(YEAR, i, DATE);
			int date = DATE;
			if (i + 1 == (date % 10 + date / 10 % 10)) {
				result++;
			}
			calendar.roll(Calendar.DATE, true);
			date = calendar.get(Calendar.DATE);
			while (date > DATE) {
				if (i + 1 == (date % 10 + date / 10 % 10)) {
					result++;
				}
				calendar.roll(Calendar.DATE, true);
				date = calendar.get(Calendar.DATE);
			}
		}
		/* メイン処理終了 */

		// 結果出力
		System.out.println(result);
	}
}