#include "bits/stdc++.h"

using namespace std;

const char en = '\n';
using  ll =          long long;
using ull = unsigned long long;


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

	int n,ar[200000];
	ll k;
	cin>>n>>k;

	for(int i=0;i<n;i++){
		cin>>ar[i];
		ar[i]--;
	}
	int buf;
	for(int i=0;i<n;i++){
		if(i!=ar[i]){
			buf=ar[ar[i]];
			ar[ar[i]]=ar[i];
			ar[i]=buf;
			k--;
		}
	}
	cout<<((k%2==0)?"YES":"NO")<<en;

	return 0;
}