#include "bits/stdc++.h"
using namespace std;
#define fr first
#define sc second
#define eb emplace_back
const char nl = '\n';
void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define dbg(x...) cerr << "LINE(" << __LINE__ << ") -> " <<"[" << #x << "] = ["; _print(x)
#else
#define dbg(x...)
#endif
vector<int> L, R;
vector<vector<int>> dist;
int n;
vector<int> tp;
void init(int N, std::vector<int> H) {
n = N;
L.resize(n);
stack<int> st;
for(int i = 0; i < n; ++i) {
while(!st.empty() && H[st.top()] < H[i]) st.pop();
L[i] = (st.empty() ? -1 : st.top());
st.push(i);
}
while(!st.empty()) st.pop();
R.resize(n);
for(int i = n - 1; i >= 0; --i) {
while(!st.empty() && H[st.top()] < H[i]) st.pop();
R[i] = (st.empty() ? -1 : st.top());
st.push(i);
}
/* for(int i = 0; i < N; ++i) { */
/* cout << i << " : " << L[i] << ' ' << R[i] << nl; */
/* } */
int deg[n] = {};
for(int i = 0; i < n; ++i) {
if(L[i] != -1) ++deg[L[i]];
if(R[i] != -1) ++deg[R[i]];
}
queue<int> q;
for(int i = 0; i < n; ++i) {
if(deg[i] == 0) q.emplace(i);
}
while(!q.empty()) {
int y = q.front(); q.pop(); tp.eb(y);
/* cout << y << ' '; */
if(L[y] != -1) {
--deg[L[y]];
if(deg[L[y]] == 0) q.emplace(L[y]);
}
if(R[y] != -1) {
--deg[R[y]];
if(deg[R[y]] == 0) q.emplace(R[y]);
}
}
cout << nl;
/* dist = vector<vector<int>>(n, vector<int>(n, -1)); */
/* for(int x = 0; x < n; ++x) { */
/* dist[x][x] = 0; */
/* queue<int> q; */
/* q.emplace(x); */
/* while(!q.empty()) { */
/* int y = q.front(); q.pop(); */
/* if(L[y] != -1 && dist[x][L[y]] == -1) { */
/* dist[x][L[y]] = dist[x][y] + 1; */
/* q.emplace(L[y]); */
/* } */
/* if(R[y] != -1 && dist[x][R[y]] == -1) { */
/* dist[x][R[y]] = dist[x][y] + 1; */
/* q.emplace(R[y]); */
/* } */
/* } */
/* for(int y = 0; y < n; ++y) { */
/* /1* cout << dist[x][y] << ' '; *1/ */
/* if(dist[x][y] == -1) dist[x][y] = 10*n; */
/* } */
/* /1* cout << nl; *1/ */
/* } */
}
int minimum_jumps(int A, int B, int C, int D) {
int res = 10*n;
vector<int> ds(n, 10*n);
for(int x : tp) {
if(A <= x && x <= B) ds[x] = 0;
if(L[x] != -1) ds[L[x]] = min(ds[L[x]], ds[x] + 1);
if(R[x] != -1) ds[R[x]] = min(ds[R[x]], ds[x] + 1);
if(C <= x && x <= D) res = min(res, ds[x]);
}
return res > n ? -1 : res;
}
