#include <iostream>
#include <cstdio>
#include <iomanip>
#include <cmath>
#include <cstring>
#include <algorithm>
#include <vector>
using namespace std;
int main(){
	freopen("translate.in","r",stdin);
	freopen("translate.out","w",stdout);
	int m, n, total=0, rear=1;
	cin>>m>>n;
	int a[n+1], b[m+1];
	memset(b,0,sizeof(b));
	for(int i=1;i<=n;i++){
		cin>>a[i];
		int ok=0;
		for(int j=1;j<=m;j++){
			if(a[i]==b[j]){
				ok=1;
			}
		}
		if(ok!=1){
			total++;
			if(rear==m+1){
				for(int j=1;j<=m-1;j++){
					b[j]=b[j+1];
				}
				rear--;
			}
			b[rear]=a[i];
			rear++;
		}
	}
	cout<<total;
	return 0;
}