#ifndef NETWORK_SET_H_3036B8E3
#define NETWORK_SET_H_3036B8E3
#include <map>
#include <optional>
#include <set>
#include <utility>
#include <vector>
class NetworkSet {
public:
void Clear();
void AddLink(int id1, int id2);
bool IsItemInNetwork(int id) const;
const std::set<std::pair<int, int>>& GetNetworkGraph(int id) const;
private:
std::map<int, std::set<std::pair<int, int>>> network_by_item_;
};
#endif /* end of include guard: NETWORK_SET_H_3036B8E3 */