func_code_string: #include <bits/stdc++.h>   using namespace std;   int t;   int n;   int a[5001];   bool coutNO;   vector<int> check[5001];   int main() {     cin.tie(0);     cout.tie(0);     cin >> t;     for (int ct = 1; ct <= t; ct++) {       cin >> n;       coutNO = true;       for (int i = 1; i <= n; i++) check[i].clear();       for (int i = 1; i <= n; i++) {         cin >> a[i];         check[a[i]].push_back(i);         if (check[a[i]].size() >= 3) coutNO = false;       }       if (!coutNO) {         cout <<  YES  <<   n ;         continue;       }       for (int i = 1; i <= n; i++)         if (check[i].size() == 2) {           if (check[i][0] + 1 != check[i][1]) {             coutNO = false;             break;           }         }       if (coutNO)         cout <<  NO  <<   n ;       else         cout <<  YES  <<   n ;     }     return 0;   }   