#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using ll = long long;
using vi = vector<int>;
using vvi = vector<vector<int>>;
using pii = pair<int, int>;
#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
#define repr(i, n) for (int i = (int)(n - 1); i >= 0; --i)

int main() {
    int p, q;
    cin >> p >> q;
    ll ret = 0;
    ll r, m;
    tie(r, m) = crt({0, q - 1}, {p, q});
    ret += r / p + (r + 1) / q;
    tie(r, m) = crt({0, 1}, {p, q});
    ret += r / p + (r + 1) / q;
    cout << ret << endl;
    return 0;
}