#include <bits/stdc++.h>
using namespace std;
const int MAXN = 2e5;
int h[MAXN], prevmx[MAXN], nxtmx[MAXN], idx[MAXN];
int n;
void init(int N, vector<int> H) {
n = N;
copy(H.begin(), H.end(), h);
for (int i = 0; i < n; ++i) {
idx[--h[i]] = i;
}
for (int i = 0; i < n; ++i) {
prevmx[i] = i - 1;
while (prevmx[i] != -1 && h[prevmx[i]] <= h[i]) {
prevmx[i] = prevmx[prevmx[i]];
}
}
for (int i = n - 1; i >= 0; --i) {
nxtmx[i] = i + 1;
while (nxtmx[i] < n && h[nxtmx[i]] <= h[i]) {
nxtmx[i] = nxtmx[nxtmx[i]];
}
}
}
int minimum_jumps(int A, int B, int C, int D) {
int mncnt = n;
for (int j = C; j <= D; ++j) {
vector<int> dp(n, n);
dp[j] = 0;
for (int k = h[j] - 1; k >= 0; --k) {
int cur = idx[k];
if (prevmx[cur] != -1) {
dp[cur] = min(dp[cur], 1 + dp[prevmx[cur]]);
}
if (nxtmx[cur] != -1) {
dp[cur] = min(dp[cur], 1 + dp[nxtmx[cur]]);
}
}
for (int i = A; i <= B; ++i) {
mncnt = min(mncnt, dp[i]);
}
}
return mncnt == n ? -1 : mncnt;
}
int main() {
init(7, {6, 1, 2, 3, 4, 5, 7});
cout << minimum_jumps(1, 1, 6, 6) << '\n';
cout << minimum_jumps(1, 3, 5, 6) << '\n';
cout << minimum_jumps(0, 1, 2, 2) << '\n';
return 0;
}
