#include <iostream>
#include <sstream>
#include <vector>
#include <algorithm>
#include <iterator>
 
int main(){
  std::stringstream src("....");
  std::vector<char> dest;
  // for a bit of efficiency
  std::streampos beg = src.tellg();
  src.seekg(0, std::ios_base::end);
  std::streampos end = src.tellg();
  src.seekg(0, std::ios_base::beg);
  dest.reserve(end - beg);
 
  dest.assign(std::istreambuf_iterator<char>(src), std::istreambuf_iterator<char>());
 
  std::copy(dest.begin(), dest.end(), std::ostream_iterator<char>(std::cout));
}
 

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