import sys

def input(): return sys.stdin.readline().strip()
def list2d(a, b, c): return [[c] * b for i in range(a)]
def list3d(a, b, c, d): return [[[d] * c for j in range(b)] for i in range(a)]
def list4d(a, b, c, d, e): return [[[[e] * d for j in range(c)] for j in range(b)] for i in range(a)]
def ceil(x, y=1): return int(-(-x // y))
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(N=None): return list(MAP()) if N is None else [INT() for i in range(N)]
def Yes(): print('Yes')
def No(): print('No')
def YES(): print('YES')
def NO(): print('NO')
sys.setrecursionlimit(10 ** 9)
INF = 10 ** 19
MOD = 10 ** 9 + 7
EPS = 10 ** -10

def round(x): return int((x*2+1) // 2)

A, B = MAP()
if A > B:
    A, B = B, A

ans = INF
for x in range(5000):
    for y in range(x, 5000):
        if x == y == 0:
            continue
        a = round(x / (x+y) * 100)
        b = round(y / (x+y) * 100)
        if a == A and b == B:
            ans = min(ans, x+y)
if ans == INF:
    raise Exception
else:
    print(ans)