【Henu ACM Round#17 A】Simple Game

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

ll n,m;

int main()
{
    ios::sync_with_stdio(0),cin.tie(0);
    #ifdef LOCAL_DEFINE
        freopen("rush.txt","r",stdin);
    #endif // LOCAL_DEFINE
    cin >> n >> m;
    if (m==1){
        return cout<<min(n,1LL*2)<<endl,0;
    }
    if (m==n){
        return cout<<max(1LL,n-1)<<endl,0;
    }
    int x = m-1,y = n-(m+1)+1;
    if (x>=y){
        cout <<m-1<<endl;
    }else{
        cout <<m+1<<endl;
    }
    return 0;
}