№2

#include<iostream>
#include<vector>
#include<algorithm>

using namespace std;

int main()
{
    vector<int> A;
    int num = 1;
    int k;

    while (num)
    {
        cin >> num;
        A.push_back(num);
    }
    sort(A.begin(), A.end());

    A.resize(unique(A.begin(), A.end()) - A.begin());
    k = A.size();

    for (int i = 0; i < k; i++)
        cout << A[i] << " ";

    return 0;
}