ZhukovMisha

#include <iostream>
#include <sstream>
#include <algorithm>
#include <iterator>
#include <vector>
using namespace std;

int main()
{
  size_t n = 4;
  string s = "42 54 35 76";
  
  istringstream is(s);
  
  vector<int> v;
  copy_n(istream_iterator<int>(is), n, back_inserter(v));

  /*******
  ** vector<int> v2(n);
  ** copy_n(istream_iterator<int>(is), n, v.begin());
  *******/
  copy_n(v.begin(), n, ostream_iterator<int>(cout, " "));
}

#include<iostream>
#include<algorithm>
#include<iterator>
#include<string>
using namespace std;

string getOneStr(istream& is)
{
  string result;
  copy(++istreambuf_iterator<char>(is), {}, back_inserter(result));
  return result;
}

int main()
{
  cout << "Enter the line (Win Ctrl+Z or Lin Ctrl+D end)\n$: ";
  string s = getOneStr(cin);
  cout << s << endl;
}