#include <iostream>
#include <vector>
using namespace std;
int main() {
std::vector<int> myvector(3, 100);
std::vector<int>::iterator it;
it = myvector.begin();
it = myvector.insert(it, 200);
myvector.insert(it, 2, 300);
std::cout << "myvector contains:";
for (it = myvector.begin(); it<myvector.end(); it++)
std::cout << ' ' << *it;
std::cout << '\n';
return 0;
}
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