#coding: UTF-8

import sys
from math import log
from collections import deque
from functools import reduce

### defs ###

### main ###
A,B = map(int,sys.stdin.readline().split())
if (A > B):
	A = A ^ B
	B = A ^ B
	A = A ^ B
ans = 400
for a in range(0,200):
	for b in range(a,200):
		if(b==0):
			continue
		tmpa = int(100*a/(a+b)+0.5)
		tmpb = int(100*b/(a+b)+0.5)
		if (tmpa==A and tmpb==B):
			ans = min(ans,a+b)
print(ans)