#pragma GCC optimize("O3")
#pragma GCC target("avx2")
#include <bits/stdc++.h>
using namespace std;
const int N = 300000;
int K;
struct data
{
vector<int>adj[N];
int mn[N];
void f(int u, int v, int x) {
function<void(int)>dfs = [&](int i) {
mn[i] = x;
for (int j : adj[i])
if (mn[j] < x)
dfs(j);
};
if (mn[u] < x)
dfs(u);
adj[v].push_back(u);
}
int g(int v) {
return mn[v];
}
} q[2];
void init(int n, int k) {
K = k;
for (int i = 0; i < n; i++)
q[0].mn[i] = -k;
for (int i = 0; i < k; i++)
q[0].mn[i] = -i - 1;
for (int i = 0; i < k; i++)
q[1].mn[i] = i;
for (int i = k; i < n; i++)
q[1].mn[i] = -1;
}
int add_teleporter(int u, int v) {
int x = min(v, -q[0].g(v));
int y = q[1].g(u);
if (y >= x)
return 1;
x = -x;
q[0].f(u, v, x);
q[1].f(v, u, y);
return 0;
}
