#include<iostream>
#include<vector>
#include<map>
#include<set>
#include<unordered_map>
#include<unordered_set>
#include<string>
#include<algorithm>
#include<queue>
#include<cstdlib>
#include<cstdio>
#include<cmath>
#define ll long long

using namespace std;

vector<pair<ll,ll>>V


int main(){



}