func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long int co = 0, i, n, y, m, j, k, t, x = 0;     cin >> n;     int a[n + 1];     for (i = 1; i <= n; i++) cin >> a[i];     co = 0;     int c = 1;     j = 0;     vector<int> v;     map<int, int> mp;     for (i = 1; i <= n; i++) {       mp[a[i]]++;       co += a[i];       j++;       if (a[i] < 0) {         if (mp[-1 * a[i]] != 1) {           co = -1;           break;         }       }       if (mp[a[i]] > 1) {         c = 0;         break;       }       if (co == 0) {         v.push_back(j);         mp.clear();         j = 0;         co = 0;       }     }     if (!co) {       if (c) {         cout << v.size() <<   n ;         for (int i = 0; i < v.size(); i++) {           cout << v[i] <<    ;         }       } else         cout << -1 <<   n ;     } else       cout << -1 <<   n ;   }   