import sys
input = sys.stdin.readline
Gx, Gy = map(int, input().split())
if Gx==Gy==0:
    print(0)
elif Gx==Gy:
    print(1)
elif Gx+Gy==0:
    print(1)
elif Gx==0 or Gy==0:
    print(1)
else:
    print(2)