#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;

bool A[200000];
int X[200000];

int solve(int i) {
	int cnt = 0;
	if (A[X[i] - 1] == false){
		A[i] = true;
		cnt = solve(X[i] - 1) + 1;
	}
	return cnt;
}

int main()
{
	int n, k; cin >> n >> k;
	for (int i = 0; i < n; i++)cin >> X[i];

	int sum = 0;
	for (int i = 0; i < n; i++) {
		if (!A[i]) {
			A[i] = true;
			sum += solve(i);
		}
	}

	if ((k - sum) % 2 == 0)cout << "YES" << endl;
	else cout << "NO" << endl;

    return 0;
}