/* -*- coding: utf-8 -*-
 *
 * 1748.cc:  No.1748 Parking Lot - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int n, k;
  scanf("%d%d", &n, &k);

  if (n == 1) puts("1");
  else printf("%d\n", (k == n - 1) ? n : n - 1);
  return 0;
}