#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)

signed main(){
  int n,k;
  cin>>n>>k;
  if(n==1 && k==1){
    cout<<1<<endl;
    return 0;
  }
  if(k==n-1) cout<<n<<endl;
  else cout<<n-1<<endl;
  return 0;
}