func_code_string: #include <bits/stdc++.h>   using namespace std;   int cnt[30000];   int main() {     int n;     cin >> n;     cnt[0] = 1;     for (long long i = 0; i < n; ++i) {       int a;       cin >> a;       for (long long q = 0; q < 30000 - a; ++q) {         if (cnt[q] == 1) {           cnt[q + a] = 1;         }       }     }     for (int i = 0; i < 30000; ++i) {       if (cnt[i] == 0) {         cout << i << endl;         return 0;       }     }     cout << -1 << endl;   }   