#include "game.h"
# include <bits/stdc++.h>
using namespace std;
int cek[1501][1501], cnt[1501], ls[1501];
void initialize(int n) {
for(int i=0;i<n;i++) {
for(int k=0;k<n;k++) {
cek[i][k] = -1;
}
cek[i][i] = 0;
cnt[i] = n - 1;
if(i != n - 1) ls[i] = n - 1;
else ls[i] = n - 2;
}
}
void upd(int f) {
while(ls[f] >= 0 && cek[f][ls[f]] != -1) ls[f]--;
return;
}
int hasEdge(int u, int v) {
if(cek[u][v] != -1) return cek[u][v];
if(cnt[v] == 1) swap(u, v);
if(cnt[u] == 1) {
cnt[u] = 0;
cek[u][v] = cek[v][u] = 1;
cnt[v]--;
int a = v;
while(cnt[a] == 1) {
upd(a);
cek[a][ls[a]] = cek[ls[a]][a] = 1;
cnt[ls[a]]--;
a = ls[a];
}
} else {
cek[u][v] = cek[v][u] = 0;
cnt[u]--;
cnt[v]--;
int a = v;
while(cnt[a] == 1) {
upd(a);
cek[a][ls[a]] = cek[ls[a]][a] = 1;
cnt[ls[a]]--;
a = ls[a];
}
a = u;
while(cnt[a] == 1) {
upd(a);
cek[a][ls[a]] = cek[ls[a]][a] = 1;
cnt[ls[a]]--;
a = ls[a];
}
}
return cek[u][v];
}
