#include <cstdio>    // for printf, sprintf.
#include <cstdlib>	// for EXIT_FAILURE
#include <tchar.h>	// for _T.
#include <Windows.h>	// for MessageBox.
#include <vector>	// for vector.

/*

実行方法:
cmd /u /c "dir /b" > "unique.txt"
test.exe < "unique.txt"

*/

int main()
{
	std::vector<char> kuso;

	int ch;
	while ( ch = std::fgetc(stdin), ch != EOF )
	{
		kuso.push_back(ch);
	}

	if ( (kuso.size() % 2) != 0 )
	{
		_tprintf(_T("Oops...\n"));
		return EXIT_FAILURE;
	}

	TCHAR msg[100];
	_stprintf(msg, _T("%02X %02X %02X %02X"), kuso[0], kuso[1], kuso[2], kuso[3]);
	::MessageBox(nullptr, msg, nullptr, 0); // 21 9D ....

	std::vector<wchar_t> buri;
	auto kuso_size = kuso.size();
	for ( auto i = 0; i < kuso_size; i += 2 )
	{
		auto wch = ((kuso[i + 1] & 0xFF) << 8) | (kuso[i] & 0xFF);
		buri.push_back(static_cast<wchar_t>(wch));
	}
	buri.push_back(wchar_t()); // NUL terminated.

	_stprintf(msg, _T("%04X %04X %04X %04X"), buri[0], buri[1], buri[2], buri[3]);
	::MessageBox(nullptr, msg, nullptr, 0); // 219D ....

	::MessageBoxW(nullptr, buri.data(), L"unkoo", 0);
}