import sys
input = sys.stdin.readline
N,K=map(int,input().split())

if N==0 and K!=0:
    print("INF")
    sys.exit()

if K>=N+1:
    print("INF")
    sys.exit()
    
ANS=0
for x in range(N,10**6):
    for i in range(K+1):
        if x & (x+i)==N:
            ANS+=1

print(ANS)