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

typedef long long ll;

int main() {
    int K, N, ans;
    cin >> N >> K;
    if (N == 1) {
        ans = 1;
    } else if (N == 2) {
        ans = 3 - K;
    } else {
        if (K == N - 1) ans = N;
        else ans = N - 1;
    }
    cout << ans << endl;
}