import sys

readline = sys.stdin.readline

ns = lambda: readline().rstrip()
ni = lambda: int(readline().rstrip())
nm = lambda: map(int, readline().split())
nl = lambda: list(map(int, readline().split()))

def solve():
    a, b = nm()
    print(min(a, b) * 2 if a != b else 2 * a - 1)
    return

solve()