#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;

typedef modint998244353 mint;
typedef long long ll;

int main(){
	int n, k; cin >> n >> k;
	vector<int> bucket(n+1);
	for (int i=0; i<n; i++){
		int a; cin >> a;
		bucket[a]++;
	}
	sort(bucket.begin(), bucket.end());
	reverse(bucket.begin(), bucket.end());
	int piv = 0;
	int ans = 1;
	for (int i=0; i<k; i++){
		if (bucket[piv] == 0){
			piv++;
			ans++;
		}
		bucket[piv]--;
	}
	cout << ans << endl;
}