#include<bits/stdc++.h>
using namespace std;
#ifndef local
#include "jumps.h"
#endif
#define F first
#define S second
#define double long double
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define pb push_back
#define sz(x) (int)(x.size())
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
#define vi vector<int>
#define vp vector<pii>
#define vvi vector<vi>
#define ykh mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count())
const int mxn = 2e5 + 5;
int n, h[mxn], l[20][mxn], r[20][mxn];
void init(int N, std::vector<int> H) {
n = N;
for(int i = 1; i <= n; i++){
h[i] = H[i - 1];
}
vector<int>st;
for(int i = 1; i <= n; i++){
while(sz(st) and h[st.back()] < h[i]) st.pop_back();
l[0][i] = sz(st) ? st.back() : i;
st.pb(i);
}
st.clear();
r[0][n + 1] = n + 1;
l[0][n + 1] = n + 1;
for(int i = n; i > 0; i--){
while(sz(st) and h[st.back()] < h[i]) st.pop_back();
r[0][i] = sz(st) ? st.back() : i;
st.pb(i);
}
for(int i = 1; i < 20; i++){
for(int j = 0; j <= n + 1; j++){
l[i][j] = min(l[i - 1][l[i - 1][j]], l[i - 1][r[i - 1][j]]);
r[i][j] = max(r[i - 1][r[i - 1][j]], r[i - 1][l[i - 1][j]]);
//cout << i << ' ' << j << ' ' << l[i][j] << ' ' << r[i][j] << '\n';
}
}
}
int minimum_jumps(int A, int B, int C, int D) {
A++, B++, C++, D++;
int L = A, R = B, ans = 0;
for(int i = 19; i >= 0; i--){
int nl = min(l[i][L], l[i][R]);
int nr = max(r[i][L], r[i][R]);
//cout << nl << ' ' << nr << '\n';
if(nr < C){
ans += (1 << i);
L = nl, R = nr;
}
}
if(r[0][R] == C or r[0][L] == C){
return ans + 1;
}
return -1;
}
#ifdef local
int main() {
freopen("/Users/iantsai/cpp/input.txt","r",stdin);
freopen("/Users/iantsai/cpp/output.txt","w",stdout);
int N, Q;
assert(2 == scanf("%d %d", &N, &Q));
std::vector<int> H(N);
for (int i = 0; i < N; ++i) {
assert(1 == scanf("%d", &H[i]));
}
init(N, H);
for (int i = 0; i < Q; ++i) {
int A, B, C, D;
assert(4 == scanf("%d %d %d %d", &A, &B, &C, &D));
printf("%d\n", minimum_jumps(A, B, C, D));
}
return 0;
}
#endif
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