#include "jumps.h"
#include<bits/stdc++.h>
#include <vector>
using namespace std;
int n;
vector<int> haha(200010);
vector<int> lb(200001);
vector<int> rb(200001);
vector<pair<int,int>> seg(1000001);
int big[200001][18];
int sm[200001][18];
void build(int l, int r, int x) {
if(l == r) {
seg[x] = {haha[l],l};
return;
}
int mid = (l+r)/2;
build(l,mid,x*2);
build(mid+1,r,x*2+1);
seg[x] = max(seg[x*2],seg[x*2+1]);
}
pair<int,int> dude(int l, int r, int ql, int qr, int x) {
if(l == ql && r == qr) {
return seg[x];
}
int mid = (l+r)/2;
if(qr <= mid) {
return dude(l,mid,ql,qr,x*2);
}
else if(ql > mid) {
return dude(mid+1,r,ql,qr,x*2+1);
}
else {
return max(dude(l,mid,ql,mid,x*2),dude(mid+1,r,mid+1,qr,x*2+1));
}
}
void calc(int x) {
stack<pair<int,int>> idk;
for(int i = 0; i < n; i++) {
while(!idk.empty() && idk.top().first < haha[i]) {
idk.pop();
}
int c;
if(idk.empty()) {
c = n;
}
else {
if(x == 0) {
c = idk.top().second;
}
else {
c = n-idk.top().second-1;
}
}
if(x == 0) {
lb[i] = c;
}
else {
rb[n-i-1] = c;
}
idk.push({haha[i],i});
}
}
void init(int N, std::vector<int> H) {
n = N;
haha[n] = 0;
lb[n] = n;
rb[n] = n;
for(int i = 0; i < n; i++) {
haha[i] = H[i];
}
calc(0);
for(int i = 0; i < n/2; i++) {
swap(haha[i],haha[n-i-1]);
}
calc(1);
for(int i = 0; i < n/2; i++) {
swap(haha[i],haha[n-i-1]);
}
for(int i = 0; i <= n; i++) {
if(haha[lb[i]] > haha[rb[i]]) {
big[i][0] = lb[i];
sm[i][0] = rb[i];
}
else {
big[i][0] = rb[i];
sm[i][0] = lb[i];
}
}
for(int i = 1; i < 18; i++) {
for(int j = 0; j <= n; j++) {
big[j][i] = big[big[j][i-1]][i-1];
sm[j][i] = sm[sm[j][i-1]][i-1];
}
}
build(0,n-1,1);
}
int minimum_jumps(int a, int b, int c, int d) {
int ans = 0;
int y = lb[c];
if(y == n) {
y = -1;
}
a = max(a,y+1);
if(a > b) {
return -1;
}
int x = dude(0,n-1,a,b,1).second;
for(int i = 17; i >= 0; i--) {
if(big[x][i] != n && haha[big[x][i]] <= haha[c]) {
x = big[x][i];
ans+=(1 << i);
}
}
for(int i = 17; i >= 0; i--) {
if(sm[x][i] != n && haha[sm[x][i]] <= haha[c]) {
x = sm[x][i];
ans+=(1 << i);
}
}
if(haha[x] == haha[c]) {
return ans;
}
else {
return -1;
}
}
