n = list(map(int, input()))[::-1]
m = ""
if n[-1]<4:
	print("5"*(len(n)-1))
	exit()
	
for i, l in enumerate(n):
	if l > 5:
		m += "5"
		continue
	elif l > 3:
		m += str(l)
		continue
	else:
		m += "5"
		try:
			if n[i+1] > 0:
				n[i+1] -= 1
			else:
				j = i+1
				while n[j] <= 0:
					n[j] = 5
					n[j+1] -= 1
					j += 1
		except:
			m = "5"*(len(n)-1)
			break
print(m[::-1])