#include <iostream> #include <vector> #include <cstring> using namespace std; int main() { int n; cin >> n; bool visited[5001]; memset(visited, false, sizeof(visited)); vector<int> res; for (int i = 0; i < n; ++i) { int x; cin >> x; if (!visited[x]) { res.push_back(x); visited[x] = true; } } for (int i = 0; i < res.size(); ++i) { if (i > 0) cout << " "; cout << res[i]; } cout << endl; return 0; }