#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
ll n;
cin >> n;
ll sy, sx, ey, ex;
cin >> sy >> sx;
cin >> ey >> ex;
vector<ll> lines(n);
for (ll i = 0; i < n; i++) {
cin >> lines[i];
}
// zero-indexed
ll s_row = sy - 1, s_col = sx - 1;
ll e_row = ey - 1, e_col = ex - 1;
// vertical moves
ll d = abs(s_row - e_row);
// find the minimum line length along the vertical path
ll lo = min(s_row, e_row), hi = max(s_row, e_row);
ll m = lines[lo];
for (ll i = lo + 1; i <= hi; i++) {
m = min(m, lines[i]);
}
// the column after vertical moves is clamped
ll c_after = min(s_col, m);
// horizontal moves to reach target column
ll h = abs(c_after - e_col);
cout << (d + h) << "\n";
return 0;
}
