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#include<iostream>
#include<cstdio>
#include<cstring>
#include<vector>
#include<algorithm>
#ifdef L_JUDGE
#pragma warning(disable:4996)
#endif
using namespace std;
const int MAXN=5e4+10;
const int MAXM=5010;
const int NODE_CAPACITY=10;
class Point{
public:
    int x,y;
    Point(int a=0,int b=0){
         x=a;y=b;
    }
    Point(const Point& p){
        x=p.x;
        y=p.y;
    }
};
class QuadtreeNode{
    public:
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