#include <iostream>
#include <algorithm>
#include <vector>

using namespace std;

int f(int N, int K, int L) {
  int ans = 0;
  for (int i = 0; i <= L; i++) {
    for (int j = i; j <= i+K; j++) {
      if ((i & j) == N) {
        ans++;
      }
    }
  }
  return ans;
}

int main() {
  int N, K;
  cin >> N >> K;
  int ans = f(N, K, 1000000);
  int ans2 = f(N, K, 2000000);
  if (ans != ans2) {
    cout << "INF" << endl;
  } else {
    cout << ans << endl;
  }
}