using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var n = int.Parse(line[0]);
        var k = int.Parse(line[1]);
        getAns(n, k);
    }
    static void getAns(int n, int k)
    {
        if (n == 1) { Console.WriteLine(1); return; }
        Console.WriteLine(k == n - 1 ? n : n - 1);
    }
}