#include "game.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const int N = 1610;
int gn;
int p[N], sz[N];
bool was[N][N];
int get(int a) {
return (p[a] = (p[a] == a ? a : get(p[a])));
}
void unt(ll a, ll b) {
a = get(a);
b = get(b);
if(a == b)return;
if(sz[a] < sz[b])swap(a, b);
p[b] = a;
sz[a] += sz[b];
}
void initialize(int n) {
gn = n;
for(int i = 0; i < n; i++)
sz[i] = 1, p[i] = i;
}
int hasEdge(int u, int v) {
was[u][v] = 1;
was[v][u] = 1;
if(get(u) == 0 && get(v) == 0)return 0;
if(get(u) != 0 && get(v) != 0)return 0;
if(get(u) != 0)swap(u, v);
if(get(u) == 0) {
for(int i = 0; i < gn; i++) {
if(get(i) == 0 && !was[i][v])return 0;
}
unt(u, v);
return 1;
}
return 1;
}
/*
int read_int() {
int x;
assert(scanf("%d", &x) == 1);
return x;
}
int main() {
int n, u, v;
n = read_int();
initialize(n);
for (int i = 0; i < n * (n - 1) / 2; i++) {
u = read_int();
v = read_int();
printf("%d\n", hasEdge(u, v));
}
return 0;
}
*/
