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#include <bits/stdc++.h>
using namespace std;
ifstream in("secv.in");
ofstream out("secv.out");
int a[5001],d[5001],n,i,j,maxim,x[5001],k,maxd,pozd;
int main()
{
in>>n;
in>>a[1];
d[1]=1;
for(i=2;i<=n;i++)
{
in>>a[i];
maxim=0;
for(j=i-1;j>=1;j--)
if(a[i]>a[j])
maxim=max(maxim,d[j]);
d[i]=maxim+1;
if(d[i]>maxd)
{
maxd=d[i];
pozd=i;
}
}
k=0;
x[++k]=pozd;
for(i=pozd-1;i>=1;i--)
{
if(d[i]==d[pozd]-1)
{
pozd=i;
x[++k]=i;
}
}
out<<x[1]-pozd+1;
}