SatanistArtem

#include <vector>
#include <iostream>
#include <iterator>
#include <fstream>

struct Node
{
	int x;
	int y;
	Node() : x(0), y(0) {}
	Node(int x, int y) : x(x), y(y) {}

	friend std::ostream& operator<<(std::ostream& os, const Node& node)
	{
		os << node.x << " " << node.y << " ";
		return os;
	}
	friend std::istream& operator>>(std::istream& is, Node& node)
	{
		is >> node.x >> node.y;
		return is;
	}
};

class Way
{
private:
	std::vector<Node> path;

public:
	Way(){}
	Way(const std::vector<Node>& path) : path(path) {}
	Way(const Way& otherWay) : path(otherWay.path) {}

	// в файл пишем количество элементов в path и сам path
	friend std::fstream& operator<<(std::fstream& os, const Way& way)
	{
		os << way.path.size() << " ";
		std::copy(way.path.begin(), way.path.end(), std::ostream_iterator<Node>(os, " "));
		os << std::endl;
		return os;
	}
	friend std::fstream& operator>>(std::fstream& is, Way& way)
	{
		size_t size = 0;
		is >> size;
		way.path.resize(size);
		std::copy_n(std::istream_iterator<Node>(is), size, way.path.begin());
		return is;
	}
	// на экран выводим только содержимое path
	friend std::ostream& operator<<(std::ostream& os, const Way& way)
	{
		std::copy(way.path.begin(), way.path.end(), std::ostream_iterator<Node>(os, " "));
		os << std::endl;
		return os;
	}
};



int main()
{
	std::vector<Node> path0{ Node(3,2), Node(2,4), Node(4,5) };
	std::vector<Node> path1{ Node(1,4), Node(4,3), Node(3,2) };
	Way way0(path0);
	Way way1(path1);

	std::fstream ways;
	ways.open("1.txt", std::ios_base::out | std::ios_base::trunc);
	ways << way0 << way1;
	ways.close();

	Way way0r;
	Way way1r;

	ways.open("1.txt", std::ios_base::in);
	ways >> way0r >> way1r;
	ways.close();

	std::cout << way0r << way1r;
	return 0;
}