func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     long long row1[n], row2[n];     for (int i = 0; i < n; i++) cin >> row1[i];     for (int i = 0; i < n; i++) cin >> row2[i];     long long first, second, pref = 0, pres = 0;     for (int i = 0; i < n; i++) {       first = max(pref, pres + row1[i]);       second = max(pres, pref + row2[i]);       pref = first;       pres = second;     }     cout << max(pref, pres);     return 0;   }   