#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); i++)
#define all(x) (x).begin(), (x).end()
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
using vvi = vector<vector<int>>;
const ll inf = 1e9;

int d[200005];

int main() {
  ll n,k;
  cin>>n>>k;
  rep(i,n) cin>>d[i];
  rep(i,n){
    if(d[i]==-1) continue;
    int j=d[i]-1;
    d[i]=-1;
    while(d[j]!=-1){
      int nj=d[j]-1;
      d[j]=-1;
      j=nj;
      k--;
      }
  }
  if(k>=0 && k%2==0) cout<<"YES"<<endl;
  else cout<<"NO"<<endl;
  return 0;
}