import java.util.*;
public class Main {
static int n;
static ArrayList<Integer> v = new ArrayList<Integer>();
static int[] dp = new int[2000];
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
n = sc.nextInt();
for (int i = 0; i < n; i++) {
v.add(sc.nextInt());
}
Collections.reverse(v);
for (int i = 0; i < n; i++) {
dp[i] = 1;
}
for (int i = 1; i < n; i++) {
for (int j = 0; j < i; j++) {
if (v.get(j) < v.get(i)) {
dp[i] = Math.max(dp[i], dp[j] + 1);
}
}
}
int maxValue = 0;
for (int i = 0; i < n; i++) {
maxValue = Math.max(maxValue, dp[i]);
}
System.out.println(n - maxValue);
}
}