#include <iostream>
#include <vector>
using namespace std;
int main(){
	vector<int> a;
	vector<int> b(3,100);//b = {100, 100, 100}
	vector<int> c(b.begin(),b.end());
	vector<int> d(c);
	
	for(/*vector<int>::iterator*/ auto ti = b.begin(); ti != b.end(); ti++){
		cout << *ti << " ";
	} 
	cout << endl;
	
	b.push_back(300);
	b.push_back(500);
	 
	cout << b.size() << " " << b.capacity() << endl;
	b.resize(10);
	b.reserve(100); 
	cout << b.size() << " " << b.capacity() << endl;
	
	auto ti = b.begin() + 3;
	b.insert(ti, 20);
	for(int i = 0; i < b.size(); i++){
		cout << b.at(i) << " ";
	}
	cout << endl;
	
	return 0;
}