#include <algorithm>
#include <iostream>
#include <limits>


int main() {

	std::cout << "Enter To-Minify: \n"
				 "Press Ctrl+d (Unix) or Ctrl+z followed by Enter on a new line (Windows) to confirm input\n"
				 "Press Ctrl+c or enter an empty string to exit" << std::endl;

	std::string input;
	std::getline(std::cin, input, static_cast<char>(EOF));
	std::cin.clear();

	if (input.empty())
		return 0;

	std::replace_if(input.begin(), input.end(), [] (char c) { return isspace(c); }, ' ');

	std::string output;
	std::unique_copy(input.begin(), input.end(), std::back_insert_iterator<std::string>(output),
	             [](char i, char in){ return std::isspace(i) && std::isspace(in); });

	std::cout << "----------------------------------------\n";
	std::cout << output << "\n" << std::endl;

	return 0;
}