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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int main() {
  6.     int T;
  7.     cin >> T;
  8.  
  9.     while (T--) {
  10.         int N;
  11.         cin >> N;
  12.  
  13.         int dem[100005] = {};
  14.  
  15.         for (int i = 0; i < N; i++) {
  16.             int x;
  17.             cin >> x;
  18.             dem[x]++;
  19.         }
  20.  
  21.         int dientich = -1;
  22.         int sl = 0;
  23.  
  24.         for (int i = 1; i <= 1000; i++) {
  25.             if (dem[i] >= 4) {
  26.                 if (i * i > dientich) {
  27.                     dientich = i * i;
  28.                     sl = dem[i] / 4;
  29.                 }
  30.             }
  31.         }
  32.  
  33.         if (dientich == -1)
  34.             cout << -1 << endl;
  35.         else
  36.             cout << dientich << " " << sl << endl;
  37.     }
  38.  
  39.  
  40.  
  41.  
  42.     return 0;
  43. }
Success #stdin #stdout 0s 5312KB
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https://ideone.com/EhUYe2
language:
C++ (gcc 8.3)
created:
6 hours ago
visibility:
public

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