#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
#define repb(i, a, b) for(int i = a; i >= b; i--)
#define all(a) a.begin(), a.end()
#define o(a) cout << a << endl
#define int long long
using namespace std;
typedef pair<int, int> P;

signed main(){
    int n, k;
    cin >> n >> k;
    vector<int> d(n);
    int cnt = 0;
    rep(i, 0, n){
        cin >> d[i];
        if(d[i] != i + 1) cnt++;
    }
    if(cnt > 0) cnt--;
    bool f = true;
    if(cnt > k) f = false;
    if(cnt < k && (k - cnt) % 2 == 1) f = false;
    cout << (f ? "YES" : "NO") << endl;
}