#include <memory> 
#include <iostream> 
#include <string> 
using namespace std; 
struct Node { 
shared_ptr<Node> next; 
string value; 
~Node() { cout << "destroyed object with value " << value << endl; } 
}; 
int main(){ 
shared_ptr<Node> a = make_shared<Node>(); 
shared_ptr<Node> b = make_shared<Node>(); 
shared_ptr<Node> c = make_shared<Node>(); 
a->value = "a"; 
b->value = "b"; 
c->value = "c"; 
a->next = b;  
b->next = c;  
c->next = a;  
cout << "Done!\n"; 
}

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