sicily 1341

#include <iostream> #include <set> using namespace std; int main() { int n; while(cin >> n) { set<int> ans; int tmp; for(int i = 0; i < n; i++) { cin >> tmp; ans.insert(tmp); } cout << ans.size() << endl; bool isFirst = true; for(set<int>::iterator iter = ans.begin(); iter != ans.end(); iter++) { if(!isFirst) cout << " "; cout << *iter; isFirst = false; } cout << endl; } return 0; }