【坑】different compare function (priority, vector,...)

priority_queue<Point, vector<Point>, pqCmp>

struct pqCmp {

　　bool operator() (const Point& a, const Point& b) const {

　　　　return distance(a,center) < distance(b, center);

　　}

};

 

vector<Point> v;

sort(v.begin(), v.end(), cmp);

static bool cmp(const Point& a, const Point& b) {

　　return distance(a, center) < distance(b, center);

}