func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, temp, i, x = 0, arr[100] = {0};     map<long long, long long> inx;     cin >> n;     for (i = 0; i < n; i++) {       cin >> temp;       inx[temp] = i;     }     for (map<long long int, long long int>::iterator it = inx.begin();          it != inx.end(); ++it) {       arr[it->second] = it->first;     }     cout << inx.size() << endl;     for (i = 0; i < n; i++) {       if (arr[i] != 0) cout << arr[i] <<    ;     }     return 0;   }   