#include<iostream>
    #include<cstdio>
    int word[2016];
    using namespace std;
    bool compain(int earlier,int later){
    for(int i=0;i<later;i++){
    if(word[i]==earlier)return true;
    }
    return false;
    }
    int main(){
    freopen("translate.in","r",stdin);
    freopen("translate.out","w",stdout);
    int mem,interal,tm,wor,ans=0;
    tm=0;
    scanf("%d%d",&interal,&mem);
    for(int i=0;i<2016;i++)word[i]=-1;
    for(int i=0;i<mem;i++){
    scanf("%d",&wor);
    if(tm>=interal){
    tm=0;
    }
    if(!compain(wor,interal)){
    ans++;
    word[tm]=wor;
    tm++;
    }
    }
    cout<<ans;
    return 0;
    }