//
// ~oisín~ C++ Template
//
#include <bits/stdc++.h>
#define MX_N 5001
#define mp make_pair
#define mod7 1000000007
#define modpi 314159
#define PI 3.141592653589793238
#define pb push_back
#define FastIO ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define All(a) a.begin(),a.end()
#define fi first
#define se second
#define ll long long int
#define ull unsigned long long int
int kx[8] = {+2, +2, -2, -2, +1, +1, -1, -1};
int ky[8] = {+1, -1, +1, -1, +2, -2, +2, -2};
int d9x[9] = {+1, +1, +1, +0, +0, +0, -1, -1, -1};
int d9y[9] = {+1, +0, -1, +1, +0, -1, +1, +0, -1};
int dx4[4] = {+0, +0, +1, -1};
int dy4[4] = {+1, -1, +0, +0};
ll gcd(ull a, ull b){
return (a==0)?b:gcd(b%a,a);
}
ll lcm(ull a, ull b){
return a*(b/gcd(a,b));
}
const long long INF = 1e18;
using namespace std;
int V;
int AM[1501][1501];
int connections[1501];
int edges[1501];
void initialize(int n){
memset(AM, -1, sizeof(AM));
memset(edges, 0, sizeof(edges));
memset(connections, 0, sizeof(connections));
V = n;
return;
}
int hasEdge(int u, int v){
if(AM[u][v] != -1){
return AM[u][v];
}
if(edges[u] == V-2 || edges[v] == V-2){
AM[u][v] = 1;
++connections[u];
++connections[v];
}else{
AM[u][v] = 0;
}
++edges[u];
++edges[v];
return AM[u][v];
}
