#include <iostream>
#include <memory>
using namespace std;
 
struct node
{
	int value;
	unique_ptr<node> left;
	unique_ptr<node> right;
	node() : value(0), left(nullptr), right(nullptr) {}
	node(int v) : value(v), left(nullptr), right(nullptr) {}
};
 
int main() {
	node n;
	n.value = 200;
	n.left = unique_ptr<node>(new node(10));
	n.right = unique_ptr<node>(new node(20));
	cout << n.left.get() << "\n" << n.value << "\n" << n.right.get() << endl;
	return 0;
}

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