#include "game.h"
#include<bits/stdc++.h>
using namespace std;
int n;
vector<int> p;
vector<vector<int>> d;
int find(int a){
if (a == p[a]) return p[a];
return p[a] = find(p[a]);
}
void merge(int a, int b){
a = find(a);
b = find(b);
p[b] = a;
for (int i=0; i<n; i++){
d[a][i] += d[b][i];
d[i][a] = d[a][i];
}
}
void initialize(int n){
::n = n;
p.resize(n);
for (int i=0; i<n; i++) p[i] = i;
d.resize(n, vector<int>(n, 1));
for (int i=0; i<n; i++) d[i][i] = 0;
}
int hasEdge(int u, int v){
u = find(u);
v = find(v);
d[u][v]--;
d[v][u]--;
if (d[u][v]) return 0;
merge(u, v);
return 1;
}
