diff = 400000
digispeed = 1430000

supply = 0

def subsidy(height):
	if height < diff:
		subsidy = 8000
		blocks = height - 67200
		weeks = blocks / 10080 +1

		for i in range(weeks):
			subsidy -= subsidy/200

	elif height < digispeed:
		subsidy = 2459
		blocks = height - diff
		weeks = blocks/80160 +1

		for i in range(weeks):
			subsidy -= subsidy/100

	else:
		subsidy = 2157/2
		blocks = height - digispeed
		months = blocks*15/(3600*24*365/12)
		for i in range(months):
			subsidy *= 98884
			subsidy /= 100000

	return subsidy

supply = 0
blockcount = 1527789
for i in range(blockcount):
	supply += subsidy(i)
print supply