#include <bits/stdc++.h>
typedef long long ll;
typedef long double lb;
using namespace std;
#define all(x) (x).begin(), (x).end()
#define OVERLOAD_REP(_1, _2, _3, name, ...) name
#define REP1(i, n) for (auto i = std::decay_t<decltype(n)>{}; (i) != (n); ++(i))
#define REP2(i, l, r) for (auto i = (l); (i) != (r); ++(i))
#define rep(...) OVERLOAD_REP(__VA_ARGS__, REP2, REP1)(__VA_ARGS__)
template<class T> bool chmin(T& a, const T& b){if(a > b){a = b; return 1;} return 0;}
template<class T> bool chmax(T& a, const T& b){if(a < b){a = b; return 1;} return 0;}
const ll INF = 1000000000000000000; // 10^18

int main(){
    ll a,b;
    cin >> a >> b;
    rep(i,100010){
        if((i+1) % a == b % (i+1)){
            cout << i+1 << endl;
            return 0;
        }
    }
    return 0;
}