Submission #66311785

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
using ary = array<int, 2>;
template <typename T>
using vec = vector<T>;
constexpr int N = 2e5 + 5, mod = 998244353;

int main()
{
    ios::sync_with_stdio(false), cin.tie(0);
    int n;
    cin >> n;
    set<int> s;
    for (int i = 0; i < n; i++)
    {
        int x;
        cin >> x;
        s.insert(x);
    }
    cout << s.size() << '\n';
    for (int x : s) cout << x << ' ';
    return 0;
}

Submission Info

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