#include #include <unordered_map> using namespace std; int main() { int input; int size; unordered_map<int, int> a; cin>>size; int n = size; while(n--) { cin>>input; if(a.find(input) == a.end()) { a[input] = 1; } } for(int i = 1; i <=500; i ++) { if(a[i] == 1) cout<<...