570B - Simple Game - CodeForces Solution

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector < ll > vl;
typedef set < ll > setl;    
#define FOR(i, n) for(ll i = 1; i <= n; i++)
#define FORI(i, n) for(ll i = 0; i < n; i++)
#define all(v) v.begin(), v.end()
#define forr(it, m) for(auto it = m.begin(); it != m.end(); it++)
#define sync                          \
    ios_base::sync_with_stdio(0);     \
    cin.tie(0);                       \
    cout.tie(0) 
#define arr(a,n) for(ll i=1;i<=n;i++) cout<<a[i]<<" "; cout << "\n";
#define vecc(a,n) for(ll i=0;i<n;i++) cout<<a[i]<<" "; cout << "\n";
#define COUT(n, a) cout<< fixed << setprecision(a) << n<<endl
int main(){
    sync;
    int t = 1;
    //cin >> t;
    while(t--){
        int n, m, k;
        cin >> n >> m;
        k = n / 2;
        if(n == 1 && m == 1)cout << 1;
        else if(k < m)cout<< m - 1;
        else cout << m + 1;        
    }
}