const hash_map<string, Player>& _players;
FindCop(const hash_map<string, Player>& players, int limit = 0) : _players(players), _limit(limit){}
int operator()(const SPInfo* node) const{
const hash_map<string, Player>& _players;
FindCop(const hash_map<string, Player>& players, int limit = 0) : _players(players), _limit(limit){}
int operator()(const SPInfo* node) const{