#include<bits/stdc++.h>
#define REP(i,n) for(int i=0;i<(n);i++)
#define ALL(v) (v).begin(),(v).end()
#define SZ(x) ((int)(x).size())
#define int long long
using namespace std;

signed main()
{
    int N,K; cin>>N>>K;

    int top=-1;
    for(int i=0;i<20;i++){
        if(N>>i&1){
            top=i;
        }
    }

    int minDiff=1<<(top+1);
    for(int i=0;i<top;i++){
        if(~N>>i&1){
            minDiff-=1<<i;
        }
    }
    if(K>=minDiff) cout<<"INF"<<endl;
    else{
        int ans=0;
        for(int x=0;x<(1<<20);x++){
            for(int d=0;d<=K;d++){
                int y=x+d;
                if((x&y)==N){
                    ans++;
                }
            }
        }
        cout<<ans<<endl;
    }
}