#include <stdcomp.h>

#include <istream>
using std::istream;
using std::cin;

#include <ostream>
using std::ostream;
using std::cout;
using std::cerr;
using std::clog;

using std::ios;
using std::iostream;
using std::streambuf;

//using std::ios_base;

using std::endl;
using std::ends;
using std::flush;
using std::streamsize;
using std::streampos;
using std::unitbuf;
using std::nounitbuf;
using std::boolalpha;
using std::noboolalpha;
using std::showbase;
using std::noshowbase;
using std::showpoint;
using std::noshowpoint;
using std::showpos;
using std::noshowpos;
using std::skipws;
using std::noskipws;
using std::uppercase;
using std::nouppercase;
using std::internal;
using std::left;
using std::right;
using std::dec;
using std::hex;
using std::oct;
using std::fixed;
using std::scientific;