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#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <algorithm>
using namespace std;
const int MAXN=20000+10;
const int MAXM=400000+10;
const int inf=100000000;
struct node {
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <algorithm>
using namespace std;
typedef long long LL;
const int MAXN=100000+10;
struct Point {
int x, y;
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <iostream>
#include <algorithm>
using namespace std;
typedef long long LL;
typedef pair<int, int> point;
const int MAXN=100000+10;