#include <iostream>     // cout

#include <algorithm>    // fill_n

#include <vector>       // vector

using namespace std;

int main () {

    vector<int> myvector (,);        // myvector: 10 10 10 10 10 10 10 10

    fill_n (myvector.begin(),,);     //位置长度元素// myvector: 20 20 20 20 10 10 10 10

    fill_n (myvector.begin()+,,);   // myvector: 20 20 20 33 33 33 10 10

    cout << "myvector contains:";

    for (vector<int>::iterator it=myvector.begin(); it!=myvector.end(); ++it)

        cout << ' ' << *it;

    cout << '\n';

    return ;

}