import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
sys.setrecursionlimit(10 ** 7)

m = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
cnt = 0
for i in range(12):
    for j in range(m[i]):
        if i + 1 == sum(list(map(int, list(str(j + 1))))):
            cnt += 1
print(cnt)