#include <bits/stdc++.h>
using namespace std;
using lint = long long;
template<class T = int> using V = vector<T>;
template<class T = int> using VV = V< V<T> >;

int main() {
  cin.tie(nullptr); ios::sync_with_stdio(false);
  int n, k; cin >> n >> k;
  int c = 0;
  for (int x = 0; x < 1 << 17; ++x) {
    for (int y = x; y <= x + k; ++y) {
      if (__lg(x) != __lg(y) and (x & y) == n) {
        cout << "INF" << '\n';
        return 0;
      }
      c += (x & y) == n;
    }
  }
  cout << c << '\n';
}