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 (k == n - 1) {
			System.out.println(n);
		} else {
			System.out.println(n - 1);
		}
	}
}