#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int mod = 998244353, N = 1002;
ll a[N+2];
set<int> adj[N+2];
map<array<int, 2>, bool> seen, val;
void initialize(int n){
for(int i = 0; i < n; i++){
for(int j = 0; j < n; j++){
if(i == j)continue;
adj[i].insert(j);
}
}
}
int hasEdge(int u, int v){
if(seen[{u, v}])return val[{u, v}];
seen[{u, v}] = 1;
adj[u].erase(adj[u].find(v));
adj[v].erase(adj[v].find(u));
if(!adj[u].size() || !adj[v].size()){
val[{u, v}] = 1;
return 1;
} else return 0;
}
// int main(){
// cin.tie(0)->sync_with_stdio(0);
// }
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