#include <bits/stdc++.h>
#include <game.h>
using namespace std;
typedef vector<int> vi;
typedef vector<pair<int, int> > vpii;
typedef pair<int, int> pii;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<double, double> pdd;
typedef vector<ll> vll;
#define INF 0x3f3f3f3f
#define MOD 1000000007LL
#define EPSILON 0.00001
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define FOR(i, a, b) for (ll i=(a); i<=(signed)(b); i++)
#define F0R(i, a) for (ll i=0; i<(signed)(a); i++)
#define RFOR(i, a, b) for (ll i=(a); i >= b; i--)
#define MN 1505
int bruh[MN];
void initialize(int n){
}
int hasEdge(int u, int v){
if(u < v) swap(u, v);
++bruh[u];
return bruh[u] == u;
}
/*int main(){
//ios_base::sync_with_stdio(false);
//cin.tie(0);
int n;
cin >> n;
initialize(n);
F0R(_, n*(n-1)/2){
int u, v;
cin >> u >> v;
cout << hasEdge(u, v) << endl;
cout.flush();
}
return 0;
}*/
