#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
signed main() {
  ios::sync_with_stdio(false); cin.tie(0);
  int n, k;
  cin >> n >> k;
  if (k > n) {
    cout << "INF" << endl;
    return 0;
  }
  int ans = 0;
  for (int u = 0; u <= 101010; u++) {
    for (int v = u; v <= u + k; v++) {
      ans += (u & v) == n;
    }
  }
  cout << ans << endl;
  return 0; 
}