typedef long long ll;
typedef long double ld;
#include <bits/stdc++.h>
using namespace std;
#define int long long

signed main(){
    ll n,k;
    std::cin >> n>>k;
    if(k==n-1){
        std::cout << n << std::endl;
    }else{
        std::cout << n-1 << std::endl;
    }
}