import sys, math
input = lambda: sys.stdin.readline()[:-1]
def MI(): return map(int, input().split())
inf = 10**18

a,b = MI()

ans = min(a,b) # 1 1がコーナーケース
for i in range(b+1):
    if a-i<0: continue
    for j in range(a+1):
        if b-j<0: continue
        ans = min(ans, abs(i+j - ((a-i) + (b-j))))
        
print(ans)