func_code_string: #include <bits/stdc++.h>   using namespace std;   long long n, l[100005], r[100005];   signed main() {     scanf( %lld , &n);     long long ans = 0;     for (register long long i = 1; i <= n; i++) {       scanf( %lld%lld , &l[i], &r[i]);     }     sort(l + 1, l + n + 1);     sort(r + 1, r + n + 1);     for (register long long i = 1; i <= n; i++) {       ans += max(l[i], r[i]);     }     ans += n;     cout << ans;   }   