import sys
input=sys.stdin.readline
def I(): return int(input())
def MI(): return map(int, input().split())
def LI(): return list(map(int, input().split()))
mod=10**9+7

def main():
    A,B=MI()
    if A==B:
        print(2*A-1)
    else:
        print(min(A,B)*2)


main()