#include <bits/stdc++.h>
using namespace std;
#define int long long
vector<int> adj[200001];
int arr[200001];
int rarr[200001];
int n;
void init(int32_t N, vector<int32_t> H) {
n=N;
for(int i=0;i<N;i++)arr[i]=H[i];
for(int i=0;i<N;i++)rarr[arr[i]]=i;
stack<int> q;
for(int i=0;i<N;i++){
while(!q.empty() and q.top()<arr[i])q.pop();
if(!q.empty())adj[arr[i]].emplace_back(q.top());
q.emplace(arr[i]);
}
while(!q.empty())q.pop();
for(int i=N-1;i>=0;i--){
while(!q.empty() and q.top()<arr[i])q.pop();
if(!q.empty())adj[arr[i]].emplace_back(q.top());
q.emplace(arr[i]);
}
}
int32_t minimum_jumps(int32_t A, int32_t B, int32_t C, int32_t D) {
queue<pair<int,int>> q;
for(int i=A;i<=B;i++)q.emplace(arr[i],0);
vector<bool> visited(n);
while(!q.empty()){
auto curr = q.front();q.pop();
if(visited[curr.first])continue;
visited[curr.first]=true;
if(C<=rarr[curr.first] and rarr[curr.first]<=D)return curr.second;
for(int&i:adj[curr.first])if(!visited[i])q.emplace(i,curr.second+1);
}
return -1;
}
//int32_t main() {
// int32_t N, Q;
// assert(2 == scanf("%d %d", &N, &Q));
// std::vector<int32_t> H(N);
// for (int32_t i = 0; i < N; ++i) {
// assert(1 == scanf("%d", &H[i]));
// }
// init(N, H);
//
// for (int32_t i = 0; i < Q; ++i) {
// int32_t 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;
//}
