Deque C++

#include 
#include 
#include 
#include 
using namespace std;
int main()
{
  deque log;
  deque break_in;
  deque::iterator itr;
  break_in.push_back("A");
  break_in.push_back("B");
  break_in.push_back("C");
  break_in.push_back("D");
  break_in.push_back("E");
  log.push_back("q");
  log.push_back("w");
  log.push_back("e");
  log.push_back("r");
  log.push_back("t");
  log.push_back("y");
  log.push_back("u");
  for(itr = log.begin(); itr != log.end(); ++itr)
    cout << *itr << endl;
  itr = search(log.begin(), log.end(), break_in.begin(), break_in.end());
  if(itr != log.end())
    cout << endl << "Possible attempted break-in found." << endl;
  else
    cout << endl << "No repeated password failures found." << endl;
  return 0;
}