#include<bits/stdc++.h>
using namespace std;
#define int long long

signed main(){
	int n, k;
	cin >> n >> k;
	int num = 0;
	int a;
	for(int i = 1; i <= n; i++){
		cin >> a;
		if(a != i) num++;
	}
	num = (num + 1) / 2;
	k -= num;
	if(k >= 0) cout << "YES" << endl;
	else cout << "NO" << endl;
}