func_code_string: #include <bits/stdc++.h>   using namespace std;   int main(int argc, char const *argv[]) {     int n;     cin >> n;     int a[n];     for (int i = 0; i < n; ++i) {       cin >> a[i];     }     int cnt = 0;     std::vector<int> v;     for (int i = n - 1; i > 0; --i) {       if (a[i] != 10000) {         for (int j = i - 1; j >= 0; --j) {           if (a[j] == a[i]) {             a[j] = 10000;           }         }         v.push_back(a[i]);       }     }     if (a[0] != 10000) {       v.push_back(a[0]);     }     cout << v.size() << endl;     for (int i = v.size() - 1; i >= 0; --i) {       cout << v[i] <<    ;     }     cout << endl;     return 0;   }   