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