📄️ <cstdio>📄️ <fstream>📄️ <iomanip>📄️ <ios>📄️ <iosfwd>📄️ <iostream>📄️ <istream>📄️ <ostream>📄️ <print>📄️ <spanstream>📄️ <sstream>📄️ <streambuf>📄️ <strstream>📄️ <syncstream>