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

void main(){
   // predetermined size
   vector<int> v(10);
   for(int i = 0; i < 10; i++)
	   cout << v[i] << endl;
   cout << "size " << v.size() << endl;
   cout << "cap " << v.capacity() << endl;
   for(int i = 0; i < 10; i++)
	   v[i] = i;
   for(int i = 0; i < 10; i++)
	   cout << v[i] << endl;
   cout << "size " << v.size() << endl;
   cout << "cap " << v.capacity() << endl;
   vector<int> vgrow(0,100);
   cout << "vgrow size " << vgrow.size() << endl;
   cout << "vgrow cap " << vgrow.capacity() << endl;
   int size=5;
   for(int i = 0; i < size; i++)
	   vgrow.push_back(i);
   for(int i = 0; i < size; i++)
   	   cout << vgrow[i] << endl;
   vgrow.pop_back();
   cout << "vgrow size " << vgrow.size() << endl;
   cout << "vgrow cap " << vgrow.capacity() << endl;
   vgrow.reserve(2000);
   cout << "vgrow size " << vgrow.size() << endl;
   cout << "vgrow cap " << vgrow.capacity() << endl;
}