#include "game.h"

#include <bits/stdc++.h>

constexpr int N = 1501;
// std::vector<std::vector<int>> gr;
std::array<std::bitset<N>, N> gr;
int n;

void initialize(int n) {
    ::n = n;
    for (int i = 0; i < n; i++) {
        gr[i].reset();
        gr[i] = ~gr[i];
        gr[i][i] = 0;
    }
}

int hasEdge(int u, int v) {
    gr[u][v] = gr[v][u] = 0;

    std::bitset<N> used;
    used.reset();
    used = ~used;
    auto dfs = [&](auto dfs, int v) -> void {
        int t = (used & gr[v])._Find_first();
        used[v] = 0;
        while (t < n) {
            dfs(dfs, t);
            t = (used & gr[v])._Find_next(t);
        }
    };
    dfs(dfs, 0);
    if (used._Find_first() == n) {
        return 0;
    }
    gr[u][v] = gr[v][u] = 1;
    return 1;
}