#include <iostream>
#include <fstream>
using namespace std;
long long maxim, i, v[5005], curs, st, dr, l, lmax, n, poz;
int main()
{
    ifstream cin("secv.in");
    ofstream cout("secv.out");
    cin>>n;
    for(i=1; i<=n; i++)
    {
        cin>>v[i];
        if(maxim<v[i])maxim=v[i],poz=i;
    }
    curs=v[poz]-1;l=1;
    for(i=poz-1; i>=1; i--)
    {if(curs==0)
    break;
    if(v[i]==curs)
    curs--;
    l++;
    }
    cout<<l<<'\n';
    return 0;
}