#include <vector>

using namespace std;

// describe how the pole may be ever connected
enum connection_type
{
connection_straight,
connection_parallel,
connection_mixed,
connection_short_curcuit,
connection_nothing
};

// pole information
typedef struct
{
int connection_method;
vector<int> neighbours;
bool connected_to_battery;
} electric_pole;

vector<electric_pole> network;

// Init default network
void init_pole_network()
{
electric_pole p,p1,p2;

// pole 1 connected to battery and to pole 2
p.connection_method = connection_straight;
p.neighbours.push_back(1);
p.connected_to_battery = true;

network.push_back(p);

// pole 2 connected to pole 1 and pole 3
p1.conenction_method = connection_straight;
p1.neighbours.push_back(0);
p1.neighbours.push_back(2);
p1.connected_to_battery = false;

network.push_back(p1);

// pole 3 connected to pole 2 and to battery
p2.conenction_method = connection_straight;
p2.neighbours.push_back(1);
p2.connected_to_battery = true;

network.push_back(p2);
}

// Shut down a pole required
void destroy_pole(int id)
{
network[id].connection_method = connection_nothing;
}

// Check is network OK or ain't
bool update_network()
{
bool result = true;

for(int i=0;i<network.size();i++)
{
if(network[i].connection_method == connection_nothing)
{
result = false;
break;
}
}

return result;
}