#include<bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}

//INSERT ABOVE HERE
signed main(){
  Int n,k;
  cin>>n>>k;
  if(k==0){
    cout<<1<<endl;
    return 0;
  }  
  if(n==0){
    cout<<"INF"<<endl;
    return 0;
  }
  
  for(Int i=60;i>=0;i--){
    if((n>>i)&1){
      Int x=((2LL<<i)-1)^n;
      if(x+k>=(2LL<<i)){
        cout<<"INF"<<endl;
        return 0;
      }
      break;
    }
  }
  
  Int ans=0;
  function<void(Int, Int)> dfs=
    [&](Int x,Int s){
      if(x<0){
        if(0<=s&&s<=k) ans++;
        return;
      }
      Int d=2LL<<x;
      if(s-d>k||s+d<0) return;
      dfs(x-1,s);
      if((n>>x)&1) return;
      dfs(x-1,s+(1LL<<x));
      dfs(x-1,s-(1LL<<x));
    };
  
  dfs(60,0);
  cout<<ans<<endl;
  return 0;
}