import string
import sys
from itertools import accumulate
from typing import List, Tuple


def int1(x: str, /): return int(x) - 1


def input(): return sys.stdin.readline().rstrip('\n')


def dbg(*args, **kwargs):
    print(*(repr(arg) for arg in args), *(f'{k}: {repr(v)}' for k, v in kwargs.items()), sep='; ', file=sys.stderr)


def main():
    x, y = map(int, input().split())
    for d in range(1, 201):
        for a in range(d + 1):
            b = d - a
            aa = (200 * a + a + b) // (2 * a + 2 * b)
            bb = (200 * b + a + b) // (2 * a + 2 * b)
            if aa == x and bb == y:
                return d


def _start():
    ret = main()

    if ret is not None:
        if isinstance(ret, List) or isinstance(ret, Tuple):
            print(*ret)
        else:
            print(ret)


if __name__ == '__main__':
    _start()