import math
A,B = map(int,raw_input().split())
for i in range(0,101):
	flag = False
	for j in range(0,101):
		if i + j <= 0:continue
		if int(i * 100.0 / (i + j) + 0.5) != A:continue
		if int(j * 100.0 / (i + j) + 0.5) != B:continue
		flag = True
		print i + j
		break
	if flag:break