#include <bits/stdc++.h>
#define be(v) (v).begin(),(v).end()
#define pb(q) push_back(q)
#define rep(i, n) for(int i=0;i<n;i++)
#define all(i, v) for(auto& i : v)
typedef long long ll;
using namespace std;
const ll mod=1000000007, INF=(1LL<<60);
#define doublecout(a) cout<<fixed<<setprecision(10)<<a<<endl;

int main() {
    cin.tie(0);
    cout.tie(0);
    ios::sync_with_stdio(false);
    ll p, q;
    cin >> p >> q;
    ll g1 = __gcd(p - 1, q - 1);
    ll g2 = __gcd(p + 1, q + 1);
    if(g2 == 1) {
        g2 = __gcd(p, q - 1);
        cout << (p - 1) / g1 + (q - 1) / g1 + p / g2 + (q - 1) / g2 << endl;
        return 0;
    }
    cout << (p - 1) / g1 + (q - 1) / g1 + (p + 1) / g2 + (q + 1) / g2 << endl;
    return 0;
}