import math
inp = open ("division.in")
outp = open ("division.out", "w")
a, b = map(int, inp.readline().split( ))
if b == 0 :
	print("Na nol' delit' nel'zya!!!", file = outp)
else:
	c=a/b
	d=-c
	if (a>0) and (b<0):
		print (int(c), file = outp)
	else:
		if (a<0) and (b>0):
			print (-math.ceil(d), file = outp)
		else:
			if (a<0) and (b<0):
				print (math.ceil(c), file = outp)
			else:
				print (int(c), file = outp)
inp.close ()
outp.close ()