a,b = map(int,input().split())
if b < a:
    a,b = b,a
s = []
for i in range(a+b):
    if i%2 == 0:
        if b > 0:
            s.append(100)
            b -= 1
    else:
        if a > 0:
            s.append(200)
            a -= 1
ans = 0
for i in range(1,len(s)):
    if s[i-1] != s[i]:
        ans += 1
print(ans)