#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using Graph = vector<vector<int> >;
using PI = pair<int, int>;
using PL = pair<ll, ll>;

#define rep(i, a, b) for(int i = a; i < b; i++)
#define rep_ll(i, a, b) for(ll i = a; i < b; i++)
#define rrep(i, a, b) for(int i = a; i >= b; i--)
#define fore(i, a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()

const int INFI = 1 << 29;
const ll INFL = 1LL << 59;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    int n, k; cin >> n >> k;
    if (n == 1) cout << 1 << endl;
    else if (k == n-1) cout << n << endl;
    else cout << n-1 << endl;
}