func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[100], k[100];   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     ;     int t, n;     cin >> t;     for (int i = 0; i < t; ++i) {       cin >> n;       n *= 2;       for (int j = 0; j < n; ++j) cin >> a[j];       for (int j = 0; j < n; ++j) {         if (k[a[j]] == 0) {           cout << a[j] <<    ;           ++k[a[j]];         }       }       cout <<   n ;       for (int j = 0; j <= 100; ++j) k[j] = 0;     }     return 0;   }   