// ********** ObjectPoolDemo.cpp **********
#include <iostream>
#include <time.h>
using namespace std;

const int MAX_OBJ = 100000;
class Integer {
private:
  int i;
public:
  Integer(int i) { this->i = i; }
  int intValue() { return i; }
};
class ObjectPool {
  private:
    Integer* array[MAX_OBJ];
    int num_elements;
  public:
    ObjectPool() {
      for (int i=0; i<MAX_OBJ; i++)
        array[i] = new Integer(i);
      num_elements = MAX_OBJ; 
    }
    Integer* acquire() {
      if (num_elements == 0)
        return 0;
      else
       return array[--num_elements];
    }
    void release(Integer* obj) { array[num_elements++] = obj; }
};
int main() {
  clock_t t1 = clock();
  ObjectPool* pool = new ObjectPool();
  for (int i=0; i<MAX_OBJ; i++) {
    Integer* obj = pool->acquire();
    pool->release(obj);
  }
  clock_t t2 = clock();
  cout << (t2-t1)/1000 << " ";
  return 1;
}