#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

#define reps(i,a,b) for(int i=(a);i<(b);++i)
#define rep(i,n)   reps(i,0,n)
#define all(x) (x).begin(),(x).end()
#define INF (1000000001)
#define MOD (1000000007)
#define PI (acos(-1))

int main(){
  int N,K;
  cin >> N >> K;
  if(N==0){
    if(K==0)cout << 1 << endl;
    else cout << "INF" << endl;
    return 0;
  }

  int M = N;
  reps(i,8,20){
    M &= ~(1<<i);//Nの8桁目より上を全部0にしたやつ=M
  }

  int cnt=0;
  rep(x,511){
    rep(y,511){
      if(y-x>=K && x&&y==M)cnt++;
    }
  }

  cout << cnt << endl;
}