a,b = map(int,input().split())
lists = []
for i in range(a+b+1):
    if i % 2 == 0:
        if a != 0:
            lists.append("A")
            a -= 1
    else:
        if b != 0:
            lists.append("B")
            b -= 1
cnt = 0
for i in range(1,len(lists)):
    if lists[i] != lists[i-1]:
        cnt += 1
print(cnt)