#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
#define ALL(obj) (obj).begin(), (obj).end()
#define rALL(obj) (obj).rbegin(), (obj).rend()
using ll = long long;
// cout << fixed << setprecision(10)

int main() {
  int N, K;
  cin >> N >> K;
  int ans;
  if(N == K) ans = K-1;
  else if(N == K+1) ans = N;
  else ans = N-1;
  if(N == 1) ans = 1;
  cout << ans << endl;
  return 0;
}