#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define rep(i,a) for(int i=0;i<(a);i++)
#define MOD 1000000007

int main(){
  int N,K; cin>>N>>K;
  int cnt=0;
  rep(i,N){
    int a; cin>>a;
    if(a>0){
      cnt++;
      cnt+=a/(K+1)+(a%(K+1)?1:0);
    }
  }
  if(cnt%2) cout<<"YES"<<endl;
  else cout<<"NO"<<endl;
  return 0;
}