func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long md = 1000000007;   int main() {     long long n, s, a, t1, t2;     cin >> n;     s = n * 2;     vector<long long> v(s);     for (int i = 0; i < s; i++) {       cin >> a;       v[i] = a;     }     sort(v.begin(), v.end(), greater<long long>());     t1 = 0;     t2 = 0;     for (int i = 0; i < n; i++) {       t1 += v[i];     }     for (int i = v.size() - 1; i >= n; i--) {       t2 += v[i];     }     if (t1 == t2) {       cout << -1 <<   n ;     } else {       for (int i = 0; i < v.size(); i++) {         cout << v[i] <<    ;       }       cout <<   n ;     }   }   