#include <iostream>
#include <vector>
#include <memory>
#include <string>

using namespace std;

class AbstractVal {
public:
	virtual ~AbstractVal() {}
	virtual void print() = 0;
};

typedef unique_ptr<AbstractVal> valptr;

class IntVal : public AbstractVal {
public:
	IntVal(int x) : x_(x) {}
	void print() override { cout << x_; }
private:
	int x_;
};

class StringVal : public AbstractVal {
public:
	StringVal(string x) : x_(x) {}
	void print() override { cout << x_; }
private:
	string x_;
};

class Seznam {
public:
	void add(valptr p) { pole.push_back(move(p)); }
	void print() { for (auto&& x : pole) x->print(); }
private:
	vector<valptr> pole;
};

int main() {
	Seznam s;
	s.add(make_unique<IntVal>(123));
	s.add(make_unique<StringVal>("456"));
	s.print();
}