#include <iostream>
#include <utility>
#include <list>
using namespace std;
class Graph{
int n_v;
list<pair<int, int> > *adj;
public:
Graph(int _n_v){
n_v = _n_v;
adj = new list<pair<int, int> >[n_v];
}
};
int main()
{
Graph graph(10);
return 0;
}
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