import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int k = sc.nextInt();
		sc.close();

		if (n < k) {
			System.out.println("INF");
			return;
		}

		int ans = 0;
		int start = Math.max(n - k, 0);
		for (int i = start; i <= n + k; i++) {
			for (int j = i; j <= i + k; j++) {
				if ((i & j) == n) {
					ans++;
				}
			}
		}
		System.out.println(ans);
	}
}