#include <cstdio>
#include <set>
#define maxn 5001
using namespace std;


int main()
{
int x[maxn],subsir[maxn],T=0, n, i,j;

	freopen("secv.in", "r", stdin);
	scanf("%d\n", &n);
	for(i=1;i<=n;i++) scanf("%d ", &x[i]);
	
	set<int> Q;
	set<int>::iterator it;
	for(i=1;i<=n;i++) Q.insert(x[i]);
	
	for(it=Q.begin();it!=Q.end();++it) subsir[++T]=*it;
	int nr=0, nrmin=0x3f3f3f3f;
	for(i=1;i<=n-T+1;i++)
		if(x[i]==subsir[1])
		{
			int t=2;
			nr=0x3f3f3f3f;
			for(j=i+1;j<=n;j++)
			{
				if(x[j]==subsir[t]) t++;
				if(t==T) { nr=j; break;}
			}
			if(nr<nrmin && t==T) nrmin=nr;
		}
		freopen("secv.out", "w", stdout);
		printf("%d\n", nrmin);
	return 0;
}