n, k = map(int, input().split())

if n == 0:
    if k == 0:
        print(1)
    else:
        print("INF")
else:
    count = 0
    max_x = n + k
    for x in range(n, max_x + 1):
        min_y = x
        max_y = x + k
        for y in range(min_y, max_y + 1):
            if (x & y) == n:
                count += 1
    print(count)