need to implement these three functions add, search and remove.

class MySetList { public: virtual unsigned int size() = 0; virtual void add(string s) = 0; virtual void remove(const string & s) = 0; virtual bool search(const string & s) = 0; }; class ArraySetList : public MySetList { private: vector arr;| public: unsigned int size(); void add(string s); void remove(const string & s); bool search(const string & s); unsigned int ArraySetlist::size() {} void ArraySetList::add(strings) {} void ArraySetList::remove(const string & s){}