#include "jumps.h"
#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for (int i = (a); i <= (b); i++)
#define repa(i,a,b) for (int i = (a); i >= (b); i--)
#define lli long long int
#define debug(a) cout << #a << " = " << a << endl
#define debugsl(a) cout << #a << " = " << a << ", "
#define MAX 200000
lli n,cont,m,act,res,x;
lli arr[MAX+2];
pair<lli,lli> vecinos[MAX+2];
stack<lli> pila;
//sparse
lli izq[20][MAX+2], der[20][MAX+2], bestway[20][MAX+2];
void init(int N, std::vector<int> H) {
n = N;
rep(i,0,n-1) arr[i+1] = H[i];
arr[0] = arr[n + 1] = n + 1;
cont = 0;
while (!pila.empty()) pila.pop();
rep(i,1,n) {
while (cont > 0 && arr[pila.top()] < arr[i]) {pila.pop(); cont--;}
if (cont == 0) vecinos[i].first = 0;
else vecinos[i].first = pila.top();
izq[0][i] = vecinos[i].first;
pila.push(i);
cont++;
}
cont = 0;
while (!pila.empty()) pila.pop();
repa(i,n,1) {
while (cont > 0 && arr[pila.top()] < arr[i]) {pila.pop(); cont--;}
if (cont == 0) vecinos[i].second = N + 1;
else vecinos[i].second = pila.top();
der[0][i] = vecinos[i].second;
pila.push(i);
cont++;
}
izq[0][0] = izq[0][N + 1] = 0;
der[0][0] = der[0][N + 1] = N + 1;
//bestway
rep(i,1,n) {
bestway[i][0] = (arr[ vecinos[i].first ] > arr[ vecinos[i].second ]) ? vecinos[i].first : vecinos[i].second;
}
//monotones
rep(i,1,18) {
rep(j,0,n+1) {
izq[i][j] = izq[ i-1 ][ izq[i-1][j] ];
der[i][j] = der[ i-1 ][ der[i-1][j] ];
bestway[i][j] = bestway[ i-1 ][ bestway[i-1][j] ];
}
}
}
int minimum_jumps(int A, int B, int C, int D) {
A++;
B++;
C++;
D++;
// no existe la m
if (B == C-1) {
act = vecinos[B].second;
if (C <= act && act <= D) return 1;
else return -1;
}
//calculo m
m = B+1;
repa(i,18,0) {
if (der[i][m] >= C) continue;
m = der[i][m];
}
// crezco a la derecha
act = B;
repa(i,18,0) {
if (izq[i][act] < A) continue;
if (arr[izq[i][act]] < arr[m]) act = izq[i][act];
}
// crezco el bestway
res = 0;
repa(i,18,0) {
if (arr[bestway[i][act]] < arr[m]) {
act = bestway[i][act];
res += (1<<i);
}
}
//checo izq
x = vecinos[act].first;
x = vecinos[x].second;
if (x >= C && x <= D) return res+2;
//crezco a la derecha
repa(i,18,0) {
if (der[i][act] > D) continue;
act = der[i][act];
res += (1 << i);
if (act >= C) return res;
}
return -1;
}
