#include<cstdio>
#include <iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>

#define mod 1000000007;

using namespace std;
typedef long long ll;
typedef pair<ll, ll> Pr;

ll N, K;
ll D[200010],ind[200010];

int main()
{
	cin >> N >> K;
	for (ll i = 1; i <= N; i++) {
		cin >> D[i];
		ind[i] = D[i];
	}

	ll cnt = 0;
	for (ll i = 1; i <= N; i++) {
		if (D[i] != i) {
			swap(D[ind[i]],D[i]);
			cnt++;
		}
	}
	cout << cnt << endl;
	if (K < cnt || (K - cnt) % 2 != 0)
		cout << "NO" << endl;
	else
		cout << "YES" << endl;
	return 0;
}