Валерий Линьков

n = int(input())

def get_count(prev_level, n):
	if (0 == n):
		return 1

	count = 0
	for level in range (1, prev_level):
		if ((n - level) < 0):
			break
		count = count + get_count(level, n - level)
	return count

print (get_count(n+1, n))