# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

import datetime

#処理内容
def main():
	dt = datetime.datetime(2014, 12, 31)

	ans = 0
	for i in range(365):
		dt += datetime.timedelta(days = 1)
		m = dt.month
		day = str(dt.day)
		daysum = 0
		for j in day:
			daysum += int(j)

		if daysum == m:
			ans += 1

	print(ans)


if __name__ == '__main__':
	main()