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

typedef long long ll;

int main() {
    ll n, k;
    cin >> n >> k;
    vector<int> d(n+1);
    for(int i=1;i<=n;i++) cin >> d[i];
    int l = 1, r = n;
    int cnt = 0;
    for(int i=1;i<=n;i++)
        if(d[i] == i) cnt++;
    n -= cnt;n--;
    if(n%2==k%2 || n < 0)
        cout << "YES" << endl;
    else
        cout << "NO" << endl;
}