N,K = map(int,input().split())
ans = 0
if N == 0 and K ==0:
    print(1)
    exit()
if N == 0 and 0 < K:
    print('INF')
    exit()
cnt = 0
for i in range(K+1):
    for j in range(i,K+1):
        x = i+N
        y = j+N
        if x & y == N:
            cnt += 1
            if not (len(bin(x)) == len(bin(y))):
                print('INF')
                exit()
print(cnt)