#include <iostream>
#include <set>
using namespace std;

int main(void){
  set<int> hulk;
  hulk.insert(3);
  hulk.insert(7);
  hulk.insert(3);
  cout << hulk.count(3) << " " << hulk.count(5)
       << " " << hulk.count(7) << " " << hulk.size() << endl;
  if(hulk.find(7)!=hulk.end()){
    cout << "seitse olemas " << endl;
  }
  return 0;
}