#include <iostream>
using namespace std;
using ll = long long;

ll N, K, D[200020];
bool used[200020];

int main() {
  cin.tie(0); ios_base::sync_with_stdio(false); 
  cin >> N >> K;
  for(int i = 1; i <= N; ++i) cin >> D[i];

  int ans = 0;
  for(int i = 1; i <= N; ++i) {
    if(!used[i] && i != D[i]) {
      used[i] = true;
      int pos = D[i];
      while(pos != i) {
        used[pos] = true;
        pos = D[pos];
        ++ans;
      }
    }
  }
  if(ans % 2 == K % 2) cout << "YES";
  else cout << "NO";
  cout << '\n';
  return 0;
}