mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    a, b = map(int, input().split())
    if a > b:
        a, b = b, a
    if b <= a + 1:
        print(a + b)
    else:
        print(a * 2 + 1 + (b - a - 1) * 2)


if __name__ == '__main__':
    main()