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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main(){
  5.     int t;
  6.     cin >> t;
  7.     while(t--){
  8.         int n;
  9.         cin >> n;
  10.  
  11.         vector<int>vec(n);
  12.         for(int i=0; i< n; ++i) {
  13.             cin >> vec[i];
  14.         }
  15.  
  16.         unordered_map<int,int> mp;
  17.         for(int i=0; i<vec.size(); ++i) {
  18.             mp[vec[i]]++;
  19.         }
  20.  
  21.         bool flag = true;
  22.         for(int i=1; i<vec.size(); ++i) {
  23.             if(mp[vec[i]] == 1) {
  24.                 flag = false;
  25.                 break;
  26.             }
  27.         }
  28.  
  29.         if(!flag) {
  30.             cout << -1 << endl;
  31.             continue;
  32.         }
  33.  
  34.         vector<int> ans;
  35.  
  36.         int i = 0, j = 0;
  37.         while(i < vec.size()) {
  38.             while(j < vec.size() && vec[i] == vec[j]) j++;
  39.  
  40.             ans.push_back(j-1);
  41.             for(int k = i; k<j-1; ++k) {
  42.                 ans.push_back(k);
  43.             }
  44.             i=j;
  45.         }
  46.  
  47.         for(int i=0; i<ans.size(); ++i) {
  48.             cout << ans[i] << " ";
  49.         }
  50.         cout << endl;
  51.  
  52.  
  53.  
  54.     }
  55.  
  56. }
  57.  
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/X6f5Rz
language:
C++14 (gcc 8.3)
created:
7 days ago
visibility:
public

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