pub mod utils {
    const DYX: [(isize, isize); 8] = [
        (0, 1),
        (1, 0),
        (0, -1),
        (-1, 0),
        (1, 1),
        (-1, 1),
        (1, -1),
        (-1, -1),
    ];
    pub fn try_adj(y: usize, x: usize, dir: usize, h: usize, w: usize) -> Option<(usize, usize)> {
        let ny = y as isize + DYX[dir].0;
        let nx = x as isize + DYX[dir].1;
        if ny >= 0 && nx >= 0 && ny < h as isize && nx < w as isize {
            Some((ny as usize, nx as usize))
        } else {
            None
        }
    }
}
#[derive(Default)]
/// NOTE
/// declare variables to reduce the number of parameters for dp and dfs etc.
pub struct Solver {}
impl Solver {
    pub fn solve(&mut self) {
        let stdin = std::io::stdin();
        let mut scn = fastio::Scanner::new(stdin.lock());
        let n = scn.read::<i64>();
        let k = scn.read::<i64>();
        if n == 1 {
            println!("{}", 1);
            return ;
        }
        if k == n-1 {
            println!("{}", n);
            return ;
        }
        println!("{}", n-1);
    }
}
pub mod fastio {
    use std::collections::VecDeque;
    use std::io::BufWriter;
    use std::io::Write;
    pub struct Writer<W: std::io::Write> {
        writer: std::io::BufWriter<W>,
    }
    impl<W: std::io::Write> Writer<W> {
        pub fn new(write: W) -> Writer<W> {
            Writer {
                writer: BufWriter::new(write),
            }
        }
        pub fn flush(&mut self) {
            self.writer.flush().unwrap();
        }
        pub fn write<S: std::string::ToString>(&mut self, s: S) {
            self.writer.write(s.to_string().as_bytes()).unwrap();
        }
        pub fn writeln<S: std::string::ToString>(&mut self, s: S) {
            self.write(s);
            self.write('\n');
        }
    }
    pub struct Scanner<R> {
        stdin: R,
        buffer: VecDeque<String>,
    }
    impl<R: std::io::BufRead> Scanner<R> {
        pub fn new(s: R) -> Scanner<R> {
            Scanner {
                stdin: s,
                buffer: VecDeque::new(),
            }
        }
        pub fn read<T: std::str::FromStr>(&mut self) -> T {
            while self.buffer.is_empty() {
                let line = self.read_line();
                for w in line.split_whitespace() {
                    self.buffer.push_back(String::from(w));
                }
            }
            self.buffer.pop_front().unwrap().parse::<T>().ok().unwrap()
        }
        pub fn read_line(&mut self) -> String {
            let mut line = String::new();
            let _ = self.stdin.read_line(&mut line);
            line.trim_end().to_string()
        }
        pub fn vec<T: std::str::FromStr>(&mut self, n: usize) -> Vec<T> {
            (0..n).map(|_| self.read()).collect()
        }
        pub fn chars(&mut self) -> Vec<char> {
            self.read::<String>().chars().collect()
        }
    }
}
pub mod macros {
    #[macro_export]
    #[allow(unused_macros)]
    macro_rules ! max {($ x : expr ) => ($ x ) ; ($ x : expr , $ ($ y : expr ) ,+ ) => {std :: cmp :: max ($ x , max ! ($ ($ y ) ,+ ) ) } }
    #[macro_export]
    #[allow(unused_macros)]
    macro_rules ! min {($ x : expr ) => ($ x ) ; ($ x : expr , $ ($ y : expr ) ,+ ) => {std :: cmp :: min ($ x , min ! ($ ($ y ) ,+ ) ) } }
    #[macro_export]
    #[allow(unused_macros)]
    /// Display a line of variables
    macro_rules ! echo {() => {{use std :: io :: {self , Write } ; writeln ! (io :: stderr () , "{}:" , line ! () ) . unwrap () ; } } ; ($ e : expr , $ ($ es : expr ) ,+ $ (, ) ? ) => {{use std :: io :: {self , Write } ; write ! (io :: stderr () , "{}:" , line ! () ) . unwrap () ; write ! (io :: stderr () , " {} = {:?}" , stringify ! ($ e ) , $ e ) . unwrap () ; $ (write ! (io :: stderr () , " {} = {:?}" , stringify ! ($ es ) , $ es ) . unwrap () ; ) + writeln ! (io :: stderr () ) . unwrap () ; } } ; ($ e : expr ) => {{use std :: io :: {self , Write } ; let result = $ e ; writeln ! (io :: stderr () , "{}: {} = {:?}" , line ! () , stringify ! ($ e ) , result ) . unwrap () ; result } } ; }
    #[macro_export]
    #[allow(unused_macros)]
    /// Display a line of variables with colors
    macro_rules ! cecho {() => {{use std :: io :: {self , Write } ; writeln ! (io :: stderr () , "\x1b[31;1m{}\x1b[m:" , line ! () ) . unwrap () ; } } ; ($ e : expr , $ ($ es : expr ) ,+ $ (, ) ? ) => {{use std :: io :: {self , Write } ; write ! (io :: stderr () , "\x1b[31;1m{}\x1b[m:" , line ! () ) . unwrap () ; write ! (io :: stderr () , " \x1b[92;1m{}\x1b[m = {:?}" , stringify ! ($ e ) , $ e ) . unwrap () ; $ (write ! (io :: stderr () , " \x1b[92;1m{}\x1b[m = {:?}" , stringify ! ($ es ) , $ es ) . unwrap () ; ) + writeln ! (io :: stderr () ) . unwrap () ; } } ; ($ e : expr ) => {{use std :: io :: {self , Write } ; let result = $ e ; writeln ! (io :: stderr () , "\x1b[31;1m{}\x1b[m: \x1b[92;1m{}\x1b[m = {:?}" , line ! () , stringify ! ($ e ) , result ) . unwrap () ; result } } ; }
}
fn main() {
    std::thread::Builder::new()
        .stack_size(64 * 1024 * 1024)
        .spawn(|| Solver::default().solve())
        .unwrap()
        .join()
        .unwrap();
}