华为机试：明明的随机数

#include <iostream>
#include <set>
using namespace std;

int main() {
    int n, val;
    cin >> n;
    set<int> s;
    for (int i = 0; i < n; i++) {
        cin >> val;
        if (s.find(val) != s.end()) {
            continue;
        } else {
            s.insert(val);
        }
    }
    for (auto it = s.begin(); it != s.end(); it++) {
        cout << *it << endl;
    }
    return 0;
}