func_code_string: #include <bits/stdc++.h>   const int INF = INT_MAX;   using namespace std;   const int N = 3e5 + 10;   int arr[N];   int main() {     ios_base::sync_with_stdio(false);     stringstream ss;     int n;     cin >> n;     for (int i = 0; i < n; i++) {       cin >> arr[i];     }     map<int, bool> ma;     vector<pair<int, int> > ans;     int i = 0, j;     int start, end;     bool flag = false;     while (i < n) {       j = i;       start = i;       ma.clear();       while (j < n) {         if (ma.find(arr[j]) == ma.end()) {           ma[arr[j]] = true;         } else {           break;         }         j++;       }       if (j < n) {         end = j;         ans.push_back(make_pair(start, end));       } else {         if (ans.size() > 0) {           ans[ans.size() - 1].second = n - 1;         } else {           flag = true;         }         break;       }       i = j + 1;     }     if (flag)       ss <<  -1 n ;     else {       ss << ans.size() <<   n ;       for (int k = 0, end = ans.size(); k < end; k++) {         ss << (ans[k].first + 1) <<     << (ans[k].second + 1) <<   n ;       }     }     cout << ss.str() << endl;   }   