15 lines
283 B
C++
15 lines
283 B
C++
#include <bits/stdc++.h>
|
|
using namespace std;
|
|
int main() {
|
|
int m;
|
|
set<int> res;
|
|
cin >> m;
|
|
while (m--) {
|
|
int x;
|
|
cin >> x;
|
|
res.insert(x);
|
|
}
|
|
cout << res.size() << endl;
|
|
for (int x : res) cout << x << ' ';
|
|
return 0;
|
|
} |