#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,v.size()) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<(x.F)<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first
const int maxn=1e6+99,lg=20;
int n,t,a[maxn],pos[maxn],seg[maxn],L[maxn],R[lg][maxn],par[lg][maxn];
void build(){
f(i,0,n){
seg[i+n]=a[i];
}
f_(i,n-1,1){
seg[i]=max(seg[i<<1],seg[i<<1|1]);
}
f(i,0,n){
L[i]=i-1;
while(L[i]!=-1 && a[L[i]]<a[i]){
L[i]=L[L[i]];
}
}
R[0][n]=n;
f_(i,n-1,0){
R[0][i]=i+1;
while(R[0][i]!=n && a[i]>a[R[0][i]]){
R[0][i]=R[0][R[0][i]];
}
}
f(i,0,n){
if(a[i]==n-1){
par[0][i]=i;
}
else{
if(L[i]==-1 || (R[0][i]!=n && a[R[0][i]]>a[L[i]])){
par[0][i]=R[0][i];
}
else{
par[0][i]=L[i];
}
}
}
f_(i,n,0){
f(l,1,lg){
R[l][i]=R[l-1][R[l-1][i]];
par[l][i]=par[l-1][par[l-1][i]];
}
}
}
int get(int l,int r){
int mx=0;
for(l+=n,r+=n;l<r;l>>=1,r>>=1){
if(l&1){
maxm(mx,seg[l++]);
}
if(r&1){
maxm(mx,seg[--r]);
}
}
return pos[mx];
}
int getdist(int x,int t){
int res=1;
f_(l,lg-1,0){
if(R[l][x]<t){
x=R[l][x];
res+=(1<<l);
}
}
return res;
}
void init(int N,vector<int> H){
n=N;
f(i,0,n) a[i]=--H[i],pos[a[i]]=i;
build();
}
int minimum_jumps(int A, int B, int C, int D){
int posr=get(C,D+1),ans=0,res=0,now;
maxm(A,L[posr]+1);
if(B<A || a[get(B+1,C)]>a[posr]){
return -1;
}
now=get(A,B+1);
if(C<=R[0][now]){
return 1;
}
f_(l,lg-1,0){
int x=par[l][now];
if(R[0][x]<C){
ans+=(1<<l);
now=x;
}
}
res=getdist(now,C);
now=par[0][now];
if(a[now]<a[posr]){
minm(res,getdist(now,C)+1);
}
//cout<<ans<<" "<<res<<endl;
return ans+res;
}
int main(){
ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
/*int n;
n=7;
a[0]=3,a[1]=2,a[2]=1,a[3]=6,a[4]=4,a[5]=5,a[6]=7;
init(n,a);
while(1){
int A,B,C,D;
cin>>A>>B>>C>>D;
cout<<minimum_jumps(A,B,C,D)<<endl;
}*/
}
/*
7
3 2 1 6 4 5 7
*/
Compilation message
/usr/bin/ld: /tmp/ccd6LDNx.o: in function `main':
stub.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccAV7znu.o:jumps.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status
