struct Item{
int xi;
int yi;
//friend bool operator < (const Item & p1, const Item & p2) {
// return p1.yi < p2.yi;
//}
//friend bool operator == (const Item & p1, const Item & p2) {
// return p1.yi == p2.yi;
//}
bool operator < (const Item & p2) const
{
return this->yi < p2.yi; // 未考虑xi
}
bool operator == (const Item & p2) const
{
return this->yi == p2.yi;
}
};
map<Item, Item> inputList;
inputList.insert(std::make_pair(o, o));
