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

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int N,K; cin >> N >> K;
    vector<int> ap(N+1);
    while(N--){
       int a; cin >> a,ap.at(a)++;
    }
    sort(ap.begin()+1,ap.end());

    int now = ap.at(0),now2 = ap.back();
    if(now+now2 >= K) cout << "Yes" << endl;
    else cout << "No" << endl;

}