#include <iostream>
#include <vector>
using namespace std;
 
int main() {
	// your code goes here
	vector<int> v;
	v.push_back( 0 );
	v.push_back( 1 );
	v.push_back( 2 );
	v.push_back( 3 );
	for( vector<int>::iterator ite = v.begin(); ite != v.end(); ++ite ){
		cout << *ite << endl;
	}
	return 0;
}