#include <iostream>
#include <sstream>
#include <vector>
#include <iterator>
using namespace std;
int main() {
// your code goes here
std::stringstream ss;
ss << "123";
ss << "456";
std::vector<char> v;
v.assign(std::istreambuf_iterator<char>(ss),
std::istreambuf_iterator<char>());
cout << "<---" << endl;
for (auto& e : v) {
cout << e << endl;
}
cout << "--->" << endl;
return 0;
}
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