#include "game.h"
#include <bits/stdc++.h>
using namespace std;
int n;
bool known[1507][1507];
int G[1507][1507];
vector<int> in[1507];
int scc[1507];
void initialize(int n) {
::n = n;
memset(known, 0, sizeof known);
memset(G, 0, sizeof G);
for(int i = 0 ; i < n ; i++) {
scc[i] = i;
in[i].clear();
in[i].push_back(i);
}
}
void set_edge(int u, int v, int s) {
known[u][v] = known[v][u] = 1;
G[u][v] = G[v][u] = s;
}
int hasEdge(int u, int v) {
if(known[u][v])
return G[u][v];
if(scc[u] == scc[v]) {
set_edge(u, v, 1);
return 1;
}
int cnt = 0;
for(int x : in[scc[u]])
for(int y : in[scc[v]])
if(known[x][y])
cnt++;
int all = in[scc[u]].size() * in[scc[v]].size();
//~ cout << u << " " << v << " " << all << " " << cnt << endl;
if(cnt + 1 == all) {
set_edge(u, v, 1);
int s = scc[v];
for(int x : in[s]) {
in[scc[u]].push_back(x);
scc[x] = scc[u];
}
in[s].clear();
return 1;
}
set_edge(u, v, 0);
return 0;
}
