A,B=map(int,raw_input().split())
t=[]
for i in range(1000):
	for j in range(1000):
		if i+j!=0:
			t+=[[int(i*100./(i+j)+0.5),int(j*100./(i+j)+0.5),i+j]]
print min(i[2]for i in t if i[0]==A and i[1]==B)