#include <iostream>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <string>
#include <sstream>
#include <cmath>
#include <stack>
#include <cctype>
#include <stdio.h>

using namespace std;

int main() {

	int n=0, k=0;
	cin>>n>>k;

	int tmp=0;
	int ct=0;
	for(int i=1; i<n+1;i++){
		cin>>tmp;
		if(tmp != i){
			ct++;
		}
	}

	if((ct/2)%2 == k%2){
		cout<<"YES"<<endl;
	}else {
		cout<<"NO"<<endl;
	}
	return 0;
}