data = input()
data = data.split(" ")
x = int(data[0])
y = int(data[1])

def judge(x, y):
    # 共通
    if (x == 0 and y == 0):
        tesuu = 0
        return tesuu
    
    #ルーク
    if (x == 0 or y == 0):
        tesuu = 1;
        return tesuu;
        
    # ビショップ
    if (abs(x) == abs(y)):
        tesuu = 1
        return tesuu
    else:
        tesuu = 2
        return tesuu
    
    
print(judge(x, y))