def main():
    a, b = (map(int, input().split()))
    c = 100
    for i in range(1,201):
        for j in range(1,201):
            if (a, b) == ((200 * i + i + j ) // (2 * (i + j)),(200 * j + i + j ) // (2 * (i + j))):
                c = min(c, i + j )
    print(c)

if __name__ == "__main__":
    main()