import java.util.*;

public class Main {

    static final int N = 110;
    static int[] a = new int[N], f = new int[N];

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);    

        int n = Integer.parseInt(sc.nextLine());
        String[] s = sc.nextLine().split(" ");
        for (int i = 1; i <= n; i++) a[i] = Integer.parseInt(s[i - 1]);

        for (int i = 1; i <= n; i++) {
            f[i] = 1;
            for (int j = 1; j < i; j++)
                if (a[i] > a[j]) f[i] = Math.max(f[i], f[j] + 1);
        }

        int res = 0;
        for (int i = n; i > 0; i--) {
            int t = f[i];
            f[i] = 1;
            for (int j = n; j > i; j--)
                if (a[i] > a[j]) f[i] = Math.max(f[i], f[j] + 1);

            res = Math.max(res, f[i] + t - 1);
        }

        System.out.println(n - res);
    }
}