A,B,C,D=map(int,input().split())

if A>B:
	n=C/A 
	print(floor(n))
elif B>A:
	n=D/B
	print(floor(n))
else:
	if C>D:
		n=D/B
		print(floor(n))
	elif D>C:
		n=C/A
		print(floor(n))
	else:
		n=C/A
		print(floor(n))