import math
import sys
def S(): return sys.stdin.readline().rstrip()
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int, sys.stdin.readline().rstrip().split())
def LI(): return list(map(int, sys.stdin.readline().rstrip().split()))
def LS(): return list(sys.stdin.readline().rstrip().split())

def round_int(number):
    return int((number * 2 + 1) // 2)

a, b = MI()
ans = 1000

for i in range(101):
    for j in range(101):
        if i + j == 0:
            continue
        if round_int(100*i / (i+j)) == a and round_int(100*j / (i+j)) == b:
            ans = min(ans, i + j)

print(ans)