#include <iostream>
using namespace std;
void f( const string &some )
{
cout << "c&" << some << "\n";
}
void f( string &&some )
{
cout << "&&" << some << "\n";
}
int main() {
string s = "aaa";
f( s );
f( s + "bbb" );
f( std::move( s ) );
return 0;
}
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