func_code_string: #include <bits/stdc++.h>   using namespace std;   using ll = long long;   using ull = unsigned long long;   using pii = pair<int, int>;   using vi = vector<int>;   using vvi = vector<vi>;   const int INF = 2e9 + 5;   int main() {     cin.tie(0), cin.sync_with_stdio(0), cout.tie(0), cout.sync_with_stdio(0);     int n;     cin >> n;     vi l(n), r(n);     for (int i = 0; i < n; i++) {       cin >> l[i] >> r[i];     }     sort(l.begin(), l.end());     sort(r.begin(), r.end());     ll ans = n;     for (int i = 0; i < n; i++) ans += max(l[i], r[i]);     cout << ans;     return cout <<   n , 0;   }   