#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cstdio>
#include <string>
#include <map>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define INF 100000007

int main() {
	int n,cnt=0;
	long long int k;
	cin >> n >> k;
	vector<bool> isChecked(n);
	vector<int>d(n);
	rep(i, n)
		cin >> d[i];
	rep(i, n) {
		if (d[i] != i)
		{
			if (d[d[i]-1] == i)
				cnt+=2;
			else cnt++;
		}
	}
	string s = (k - cnt) % 2 ? "NO" : "YES";
	cout << s << endl;
}