func_code_string: #include <bits/stdc++.h>   #pragma optimize( O3 )   using namespace std;   const long long MOD = 1e9 + 7;   const long long INF = 1e9 + 7;   const int base = 2e5 + 1;   const int MAX = 1e5 + 2;   const double EPS = 1e-9;   const double PI = acos(-1.);   const int MAXN = 1e6 + 47;   mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());   int main() {     int n;     cin >> n;     int cnt = 0;     vector<int> res;     set<int> was, is;     for (long long i = (0); i < (n); ++i) {       int a;       cin >> a;       if (a < 0) {         if (is.count(abs(a))) {           is.erase(abs(a));           cnt--;         } else {           cout << -1;           return 0;         }       } else {         if (was.count(a) || is.count(a)) {           cout << -1;           return 0;         } else {           was.insert(a);           is.insert(a);           cnt++;         }       }       if (cnt == 0) {         res.push_back(i + 1);         was.clear();       }     }     if (cnt != 0) {       cout << -1;       return 0;     }     cout << (int)res.size() <<   n ;     int last = 0;     for (long long i = (0); i < ((int)res.size()); ++i) {       cout << res[i] - last <<    ;       last = res[i];     }     cerr <<   nTime elapsed:   << clock() / (double)CLOCKS_PER_SEC <<   n ;     return 0;   }   