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

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    ll N, K;
    cin >> N >> K;
    if (N + 1 <= K) {
        cout << "INF" << endl;
        return 0;
    }
    int ans = 0;
    ll p = 1LL;
    while (p < N) {p *= 2;}

    for (ll y = N; y <= p; ++y){
        if ((y & N) != N) continue; 
        for (ll x = max(N, y - K); x <= y; ++x){
            if ((x & y) == N) {++ans;}
        }
    }    
    cout << ans << endl;
    return 0;
}