/*
بسم الله الرحمن الرحيم
Author:
(:Muhammad Aneeq:)
*/
#include <iostream>
#include <set>
#include <map>
#include <queue>
#warning check the output
using namespace std;
int const N=1e6+10;
int n;
int a[N]={};
map<pair<int,int>,int>vals;
void bfs(int i,int j)
{
set<pair<int,pair<int,int>>>Q;
Q.insert({0,{i,j}});
while (Q.size())
{
int x,y;
tie(x,y)=(*begin(Q)).second;
int c=(*begin(Q)).first;
Q.erase(begin(Q));
if (vals[{x,y}]!=c)
continue;
int x1=x-1,y1=y;
if (x1>0)
{
y1=min(y,a[x1]+1);
if (vals.find({x1,y1})==vals.end())
vals[{x1,y1}]=2e9+10;
if (vals[{x1,y1}]>vals[{x,y}]+1)
{
vals[{x1,y1}]=vals[{x,y}]+1;
Q.insert({vals[{x1,y1}],{x1,y1}});
}
}
x1=x+1,y1=y;
if (x1<=n)
{
y1=min(y1,a[x1]+1);
if (vals.find({x1,y1})==vals.end())
vals[{x1,y1}]=2e9+10;
if (vals[{x1,y1}]>vals[{x,y}]+1)
{
vals[{x1,y1}]=vals[{x,y}]+1;
Q.insert({vals[{x1,y1}],{x1,y1}});
}
}
x1=x+1,y1=1;
if (x1<=n)
{
if (vals.find({x1,y1})==vals.end())
vals[{x1,y1}]=2e9+10;
if (vals[{x1,y1}]>vals[{x,y}]+a[x]+2-y)
{
vals[{x1,y1}]=vals[{x,y}]+a[x]-y+2;
Q.insert({vals[{x1,y1}],{x1,y1}});
}
}
x1=x-1;
if(x1>0)
{
y1=a[x1]+1;
if (vals.find({x1,y1})==vals.end())
vals[{x1,y1}]=2e9+10;
if (vals[{x1,y1}]>vals[{x,y}]+y)
{
vals[{x1,y1}]=vals[{x,y}]+y;
Q.insert({vals[{x1,y1}],{x1,y1}});
}
}
}
}
int sl,sc;
int el,ec;
inline void solve()
{
cin>>n;
cin>>sl>>sc;
cin>>el>>ec;
vals[{sl,sc}]=0;
for (int i=1;i<=n;i++)
cin>>a[i];
bfs(sl,sc);
int ans=2e9+10;
for (auto i:vals)
{
int x,y;
tie(x,y)=i.first;
if (el!=x)
continue;
ans=min(ans,abs(el-x)+abs(ec-y)+i.second);
}
cout<<ans<<endl;
}
int main()
{
ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
int t=1;
for (int i=1;i<=t;i++)
{
solve();
}
}
